Honest Universe

Superstition, pseudoscience, and scepticism

Press Council Complaint: Homeopathy in the Wairarapa Times-Age

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In February this year, an article was published in the Wairarapa Times-Age (both in print and online) headlined Use of natural remedies is on the rise. The article discussed some specific cases of so-called “natural remedies” being used to treat serious diseases, such as intravenous vitamin C for leukaemia and homeopathy to treat various forms of cancer.

Except for a brief mention at the bottom of the article encouraging people with cancer to talk to their doctor before using any “alternative therapies”, there was no mention of the fact that none of the treatments discussed are supported by any reliable evidence. Instead, the article uncritically included various quotes such as this, from homeopath Claire Bleakley:

Featherston-based homeopath Claire Bleakley said she has treated cancer patients using similar natural remedies [to intravenous vitamin C] – significantly extending life expectancy.

She mentioned two of her patients in particular: A man with tumours who lived for seven years after being given two to live, and a woman with ovarian cancer who lived 15 years past her initial prognosis.

“There have been some exceptional results,” Mrs Bleakley said.

“We are indoctrinated to think chemotherapy is the only cure for cancer, but alternative [remedies] have been proven to be more life giving.”

Medical anecdotes such as these unfortunately tend to be very convincing despite the fact that they can also be completely misleading. The reasons why people might get better are varied and complex. Without running a controlled test, there’s no way to know whether or not a particular treatment contributed to an improvement in health. That’s exactly why we need to undertake rigorous clinical trials before we can say with confidence what the effects of any particular treatment are. It’s also why the Medicines Act prohibits the use of health testimonials like this in advertisements, although that restriction of course doesn’t extend to news articles in publications like the Times-Age.

I thought, and still do think, that the lack of balance in this article has the capacity to do serious harm. I wrote to the editor of the Wairarapa Times-Age to make my case, and to give some suggestions for how they might attempt to mitigate the damage this article could do, in a formal complaint:

To whom it may concern,

I am writing to you to make a formal complaint regarding the article “Use of natural remedies is on the rise” published in the Wairarapa Times-Age this morning:
http://www.nzherald.co.nz/wairarapa-times-age/news/article.cfm?c_id=1503414&objectid=11399310

This article uncritically promotes the use of so-called “natural remedies” such as vitamin C or homeopathy for the treatment of cancer. They are promoted by the inclusion of quotes such as “There have been some exceptional results”, regarding the treatment of cancer with homeopathic products.

None of the relevant controversy regarding these treatments is discussed in the article. Although there is a brief note at the end that “those living with cancer [are encouraged] to consult their doctor or specialist before embarking on any alternative therapies”, this does not sufficiently address the important and relevant fact that these treatments are entirely unsupported by scientific evidence, as well as the utter implausibility of treatments like homeopathy.

The failure to discuss the lack of scientific evidence supporting these treatments, as well as the complete lack of plausibility underlying homeopathy, violates the Press Council’s principle of “Fairness, Accuracy and Balance”. The description of this principle on the Press Council’s website states that:

“Publications should be bound at all times by accuracy, fairness and balance, and should not deliberately mislead or misinform readers by commission or omission. In articles of controversy or disagreement, a fair voice must be given to the opposition view.

Exceptions may apply for long-running issues where every side of an issue or argument cannot reasonably be repeated on every occasion and in reportage of proceedings where balance is to be judged on a number of stories, rather than a single report.”

This is not a long-running issue in which readers can readily be expected to be familiar with the lack of evidence supporting the treatments discussed in the article, so the exception should not apply. There is significant controversy surrounding the issues discussed in this article, but a fair voice has not been given to the opposition view.

Particularly as this article could lead to people living with serious diseases such as cancer to rely on ineffective treatments such as homeopathy, its lack of balance has the potential to cause real and serious harm. Therefore it is important that the Wairarapa Times-Age take appropriate action to prevent this harm by amending the article, publishing a prominent correction, or publishing a followup article linked to from today’s article, that discusses the lack of evidence and plausibility underlying the treatments discussed in today’s article.

If the Wairarapa Times-Age has trouble finding any experts to talk to about this topic, either the Society for Science Based Healthcare (http://sbh.org.nz/contact) or the Science Media Centre (http://www.sciencemediacentre.co.nz/contact-us/) will be able to help.

Sincerely,

Mark Hanna
Society for Science Based Healthcare

Despite sending a follow-up email a few days later, I still hadn’t heard back from the editor over the next 10 working days, which is the deadline set in the Press Council’s complaints process as the time to wait before escalating a complaint to them if you don’t hear back from the editor. After I forwarded my complaint to the Press Council, the editor contacted me to apologise that he’d overlooked my complaint messages, which was apparently due to his having to deal with another complaint about the same article from Peter Griffin, manager of the Science Media Centre (Peter is also the editor and manager of Sciblogs, where my blog is syndicated, and we’d discussed our complaints via email prior to submitting them).

When I forwarded my complaint to the Press Council, I fleshed it out a bit more. I won’t quote the whole thing here as a lot of it would just be repeating myself, although I’d be happy to share my full complaint if anyone would like to see it, but here is one part I added that I think is important and worth sharing:

As far as I’ve been able to tell, the Wairarapa Times-Age has not published a large number of articles regarding this, so it cannot be argued that the counterpoints have already been published in earlier articles.

When it comes to whether or not readers can be expected to be familiar with the important facts not mentioned in this article, I would like to bring the Press Council’s attention to a 2009 study (I am not aware of any more recent data collected on this) published in the New Zealand Medical Journal entitled “Beliefs about homeopathy among patients presenting at GP surgeries”. This study can be accessed for free on Page 94 of this PDF:
http://www.nzma.org.nz/__data/assets/pdf_file/0010/17794/Vol-122-No-1295-22-May-2009.pdf

This study found that only 8 out of 124 respondents disagreed to some extent that “There is good scientific evidence that homeopathy works”, and only 24 respondents reported that they believed homeopathic products were either “very dilute” or that there was “nothing there”. In contrast, 82 respondents agreed to some extent that “There is good scientific evidence that homeopathy works”, and 80 believed that homeopathic products are either “Very concentrated”, “Moderately concentrated”, or “Moderately dilute”.

Contrary to these common beliefs, most homeopathic products are diluted to the point that it is astronomically unlikely that there is even a single molecule of the original ingredient present in the product, and there effectiveness is thoroughly unsupported by scientific evidence. For example, a rigorous review undertaken by the Australian Government’s National Health and Medical Research Council (NHMRC) in 2013 investigated the evidence regarding homeopathy for 68 clinical conditions and concluded that “The available evidence is not compelling and fails to demonstrate that homeopathy is an effective treatment for any of the reported clinical conditions in humans”
(https://www.nhmrc.gov.au/_files_nhmrc/file/your_health/complementary_medicines/nhmrc_homeopathy_overview_report_october_2013_140407.pdf)

For this reason, and especially because the article discussed the use of ineffective therapies in the treatment of terminal illness, it is very important that stories such as this be balanced. As I stated in my original complaint to the editor, I believe the article in its current form has the capacity to do serious harm and that the Wairarapa Times-Age has a responsibility to mitigate this harm. An appropriate response would be amending the article, publishing a prominent correction, or publishing a followup article linked to from the article from the 10th of February that discusses the lack of evidence and plausibility underlying the treatments discussed in today’s article.

(The NHMRC link I provide there is from their 2013 conclusion. Within 2 weeks of submitting this complaint, however, they released their final statement on homeopathy, which states “there are no health conditions for which there is reliable evidence that homeopathy is effective”. This statement was not reported in the Wairarapa Times-Age)

Once the complaint was escalated to the Press Council, the editor of the Times-Age was given an opportunity to respond, then I had a final opportunity to write a short response to that. His primary argument was that the topic of “alternative medicine” was a long-running issue in a wider context, and that the exemption to the principle of balance should apply because other media have reported on the opposing side of the issue.

I strongly disagree with this argument. Although it’s true that media like the Wairarapa Times-Age do not exist in a vacuum, I don’t think this should mean that they don’t have a responsibility to provide balanced articles for their readers. The way I interpret the Press Council code, the exception can be useful when an article is part of a series of articles on the same issue, and when taken in the context of other articles in the series the overall view still maintains an appropriate balance. In the interest of balanced reporting, I believe exceptions to the principle of balance should be applied very sparingly.

Unfortunately, the Press Council disagreed with me. They have ruled not to uphold the complaint, and you can view their entire decision on their website here:
Case Number: 2426 MARK HANNA AGAINST WAIRARAPA TIMES-AGE

Here’s a link to their similar ruling regarding the complaint from the Science Media Centre:
Case Number: 2425 SCIENCE MEDIA CENTRE AGAINST WAIRARAPA TIMES-AGE

Here is a summary of their decision:

The Press Council agrees with the editor that the debate over alternative remedies is sufficiently well known not to require balancing comment in every story about them. The subject falls within the exception to the principle of balance for issues of enduring public discussion.

The complainant in this case raised the important question of whether the exception can be invoked for an article in a newspaper that may not itself have covered both sides of the debate. The Council considered this point closely and came to the view that the exception has not been applied as narowly as the complainant contends and should not be. A newspaper, even if it is the sole newspaper of its locality, does not exist in a vacuum. Its readers, meeting an uncritical story on the supposed popularity of homeopathy and natural remedies, are likely to be aware the efficacy of these treatments is strongly contested by medical science.

I think this is a very worrying precedent to set. Newspapers such as the Wairarapa Times-Age can now feel justified in publishing unbalanced articles on topics such as homeopathy without feeling bound to uphold the Press Council’s principle of balance. The public have a reasonable expectation, given that the Press Council exists to uphold standards in reporting and its first principle is that articles should be accurate, fair, and balanced. While it’s a good idea to take everything you read with a grain of salt, you should be able to feel justified in expecting media reports on controversial topics to provide a balanced view. I worry that people might read articles such as this with that assumption in mind, and falsely conclude that the views omitted from the article are not merited.

I’m also rather frustrated that the Press Council concluded that anyone reading articles such as this is “likely to be aware the efficacy of these treatments is strongly contested by medical science” even though I provided data from a survey that found only 6% of respondents disagreed that “there is good scientific evidence that homeopathy works”. I understand that the survey I cited was conducted 6 years ago, but as I said in my complaint I’m unaware of anything more recent.

Although I don’t think it is, I really hope that the Press Council’s conclusion that most people are aware that homeopathy is not supported by evidence is correct. Following last year’s story about Green MP Steffan Browning backing homeopathy for ebola and March’s story about the Australian National Health and Medical Research Council concluding that homeopathy does not improve people’s health, I think there is some basis to believe that more people are familiar with the lack of evidence surrounding homeopathy than 6 years ago, but I don’t expect there would be that large a difference.

One positive thing to take away from this, at least, is that the journalist who wrote the article said in a Facebook comment that she understood the article was unbalanced and that she should have done better. I hope she’ll take this as a learning experience and, when she or other Wairarapa Times-Age reporters write on matters of “natural health” in the future, that they get in touch with the Science Media Centre to provide that much-needed balance. If we can’t rely on the Press Council to hold journalists to a high standard of balanced reporting, then we’ll have to rely on journalists’ and editors’ own standards.

EDIT 2015/04/14 10:05 am: Peter Griffin, who also complained to the Press Council about this article, has published his thoughts on the ruling as well: When balance goes out the window

EDIT 2015/04/04 1:13 pm: The Wairarapa Times-Age has published a short article on this ruling: Times-Age supported by Press Council

EDIT 2015/04/14 2:21 pm: Grant Jacobs has also published a post with his thoughts on this ruling: Press Council rules on knowing readers minds?

EDIT 2015/04/15 2:51 pm: Andrew Bonallack, the editor of the Wairarapa Times-Age, has published his thoughts on the Press Council decision in an opinion piece for the Times-Age: Your right to choose sacrosanct

Finding Power and Balance: Proving and Disproving Claims

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I’m very happy to have had an article published on the website of the New Zealand Science Teacher, the official publication of the New Zealand Association of Science Educators.

My article is about applied kinesiology, I’ve embedded the introduction below and you can read the whole thing on the NZST website: Finding Power and balance: proving and disproving claims

When reading a story about someone who has been scammed, it’s very easy to think ‘that could never happen to me’. From the outside, warning signs always appear obvious and the conclusion often seems untenable. It’s easy to assume that people who fall for scams or are otherwise misled must be unintelligent or gullible. The reality is less comfortable. We can all be fooled, even the best of us.

One historical example of someone very intelligent falling for what now seems to be clearly false, involves author and doctor Sir Arthur Conan Doyle, creator of Sherlock Holmes. Despite obviously understanding the principles of scepticism, Doyle became convinced in the early 20th century that fairies were real, based on a series of photographs of the “Cottingley Fairies”, which were revealed decades later to have been faked using paper cut-outs. Intelligence is no failsafe against being fooled.

More recently, many people, including Shaquille O’Neil and Bill Clinton, have been fooled by a plastic wristband: the makers of which claim it can improve a person’s strength and balance.

The ‘theory’ behind the tests used to promote these wristbands is also employed by various alternative health practitioners in attempts to evaluate treatment effects and to diagnose illnesses, allergies, and intolerances, despite the fact that there is no scientific proof behind it.

It’s known as ‘applied kinesiology’ and, if you don’t know any better, it can be very convincing.

100% Natural and Chemical Free

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This afternoon, the Advertising Standards Authority released their decision to uphold an interesting complaint regarding advertisements for a couple of cleaning products on a website. Here is the ASA’s description of how the products were described on the website:

The Wendyl’s website (http://wendyls.co.nz/) for “100% natural cleaning and beauty products” advertised their products as having “all their ingredients listed and contain no fillers, chemicals or synthetics.”

The webpage for Wendyl’s Oxygen Bleach 1KG (sodium Percarbonate) stated, in part:

This is powdered hydrogen peroxide which is a greener alternative to chlorine bleach because it breaks down to oxygen and water in the environment.

The webpage for Wendyl-San oxygen soaker 1KG stated, in part:

I’ve spent years testing this oxygen soaker and stain remover and I’m so glad to have something which is so free of chemicals and additives. Secret ingredient is sodium percarbonate, a powdered hydrogen peroxide bleach which breaks down in the environment to oxygen and water…

The complainant, food scientist Claire Suen, said that they breached the Advertising Code of Ethics and the Code for Environmental Claims. This excerpt is, I think, a good summary of their complaint:

The advertiser uses words such as “100% natural”, and “contains no fillers, chemicals, or synthetics”.

However, the product in question is sodium percarbonate, which is not a naturally occurring product. The main active ingredient, hydrogen peroxide, is also not a naturally occurring product and it is not stable in nature.

Both are synthetic chemicals.

After hearing from the advertiser as well, the Advertising Standards Complaints Board sided with the complainant. Here is a summary from the headnote of their decision:

The Complaints Board said it accepted the Advertiser’s view that “sodium percarbonate is a much safer and more environmnetally friendly alternative to chlorine bleach” but not that it was “chemical free” and “100% natural.” The Complaints Board said the advertisement was likely to mislead consumers into thinking the products were “100% natural” and “chemical free” when they actually contained naturally occurring chemicals, in breach of Principle 2 of the Code for Environmental Claims and had not been prepared with a due sense of social responsibility to consumers in breach of Principle 1 of the Code for Environmental Claims.

Accordingly, the Complaints Board ruled to Uphold the complaint.

The most interesting part of this complaint is, I think, who the advertiser is. As well as selling cleaning and beauty products online, Wendyl Nissen writes a weekly column for the New Zealand Herald called “Wendyl Wants To Know“. The Herald describes the column as:

Each week, Wendyl Nissen takes a packaged food item and decodes what the label tells you about its contents.

Have a look for yourself, but from the columns of hers that I’ve read it seems the main argument is typically along the lines of “natural is good, chemicals are bad”. So I find it very ironic that she’s now had a complaint upheld against her for misleadingly claiming that a product she sells is “100% natural” and “chemical free”.

For a counterexample to the attitude of “natural is good, chemicals are bad”, you need look no further than the “recipes” section of her website. There, she has some pet recipes which she makes available for free including one for De-Flea Powder for Cat Biscuits and another for Doggy De-Flea Treats. In both recipes, she claims the active ingredients are yeast and garlic:

The theory behind this powder is that fleas hate the taste of yeast and garlic so will hop off and look elsewhere.

Elsewhere on her website, she recommends that if you:

Put a garlic clove in your pet’s water you can help deter pests such as mites and fleas.

Although it certainly is natural, garlic is also toxic to cats and dogs, especially for cats. I couldn’t find any warnings about this on Wendyl Nissen’s website.

The lessons to be learned? Natural isn’t always good, and don’t take advertisers’ word for it when they claim something is “100% natural” or “chemical free”. As always, ask for evidence.

Written by Mark Hanna

2015/03/13 at 6:00 pm

Ethical Pharmacy Practice 3: Running Out of Excuses

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Ethical pharmacy practice is something I have written about before. If you’ve read those posts, please bear with me as I cover some familiar background.

In New Zealand, we are lucky enough to have an industry code of ethics for pharmacists, published by the Pharmacy Council of New Zealand, which holds pharmacists to high ethical standards. This code of ethics is the Safe Effective Pharmacy Practice Code of Ethics. One of the most important parts of this code of ethics is section 6.9, which states:

[PHARMACISTS] MUST:… Only purchase, supply or promote any medicine, complementary therapy, herbal remedy or other healthcare product where there is no reason to doubt its quality or safety and when there is credible evidence of efficacy.

Pharmacy Council’s Safe Effective Pharmacy Practice Code of Ethics Section 6.9

The Pharmacy Council of New Zealand isn’t a voluntary member organisation like the Pharmacy Guild or the Pharmaceutical Society. Instead the council is established as part of the Health Practitioners Competence Assurance Act 2003. Their roles are set out in this act and include:

  • Registering pharmacists
  • Reviewing and maintaining the competence of pharmacists
  • Setting standards of clinical competence, cultural competence, and ethical conduct for pharmacists

Which means that the Safe Effective Pharmacy Practice Code of Ethics is not a voluntary code of ethics. It is published by the body whose legal duty it is to set the standards of ethical conduct for pharmacists. Yet all over New Zealand, many pharmacists ignore it.

Walk into any New Zealand pharmacy. Chances are that you will find a section where they advertise and sell a range of homeopathic products. To anyone familiar with the evidence for homeopathy, it will come as no surprise when I tell you that there is no credible evidence of efficacy for any homeopathic product. Therefore, it seems to me, New Zealand pharmacists have an ethical obligation not to promote or sell them.

Yesterday, the Australian National Health and Medical Research Council (NHMRC) issued their final statement on homeopathy, following an incredibly extensive and rigorous review of the literature. They looked at over 1,800 scientific papers, and found that 225 met their criteria for methodological rigour, sample size, and placebo control. Their main finding was:

there are no health conditions for which there is reliable evidence that homeopathy is effective.

NHMRC Statement: Statement on Homeopathy

As I said, this conclusion does not come as a surprise. This research is the latest in a long line of reviews of the evidence for homeopathy that drew essentially the same finding:

  • A 2002 systematic review of systematic reviews of homeopathy published in the British Journal of Clinical Pharmacology concluded that:

    the hypothesis that any given homeopathic remedy leads to clinical effects that are relevantly different from placebo or superior to other control interventions for any medical condition, is not supported by evidence from systematic reviews. Until more compelling results are available, homeopathy cannot be viewed as an evidence-based form of therapy.

    A systematic review of systematic reviews of homeopathy

  • A 2010 systematic review of systematic reviews of homeopathy published in the Medical Journal of Australia concluded:

    The findings of currently available Cochrane reviews of studies of homeopathy do not show that homeopathic medicines have effects beyond placebo.

    Homeopathy: what does the “best” evidence tell us?

  • A 2010 report from the UK House of Commons concluded:

    homeopathy is a placebo treatment.

    Evidence Check 2: Homeopathy

  • In 2013, the NHMRC published a report based on their research that found:

    There is a paucity of good-quality studies of sufficient size that examine the effectiveness of homeopathy as a treatment for any clinical condition in humans. The available evidence is not compelling and fails to demonstrate that homeopathy is an effective treatment for any of the reported clinical conditions in humans.

    Effectiveness of Homeopathy for Clinical Conditions: Evaluation of the Evidence

I could go on, but I hope by now you get the idea.


New Zealand pharmacists need to respond to the NHMRC’s research. And if they mean to practice responsibly and ethically, that response should be to immediately stop all promotion and sale of homeopathic products. The ethical standard to which they should be held is clear, and it is not consistent with promoting or supplying homeopathic products.

Last year, I complained to the Advertising Standards Authority under the auspices of the Society for Science Based Healthcare about a homeopathic product for preventing jet lag (No-Jet-Lag) that was advertised in Parnell Pharmacy. The pharmacy responded by removing the advertisement, and agreeing to stop selling the product if it was found that the claims were not supported by credible evidence, and my complaint was upheld. Unsurprisingly, my complaint was upheld when the ASA decided claims such as “it really works” were not supported by credible evidence. However, despite Parnell Pharmacy’s example, many New Zealand pharmacies still sell this exact product.

The NHMRC’s report represents the same finding, but on a larger scale. New Zealand pharmacists who promote and sell homeopathic products should follow the responsible example of Parnell Pharmacy, and remove homeopathic products from their shelves.

When Marketing Trumps Science

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Recently I’ve run across a couple of New Zealand companies that sell therapeutic products – one a weight loss pill, the other a jet lag drink – that seem to put marketing first and let science take the back seat. This is by no means new behaviour, but I want to use them as examples to illustrate this widespread problem and suggest what can be done to combat it.

Before promoting a therapeutic product, you should first have good reason to believe that it works. This, I hope, is common sense, but it’s also enshrined in the Fair Trading Act and the Therapeutic Products Advertising Code as they prohibit unsubstantiated claims. This means you have to test the product, and do so rigorously. Rigorous clinical trials are expensive to undertake though, so they’re quite a prohibitive first step.

Instead of jumping straight into the deep end, a useful first step can be to undertake a smaller and less rigorous (and therefore less expensive) experiment. In order to answer the question of whether or not a product actually works you need to conduct a more rigorous trial. There’s a great cost involved in doing this, but if the results of a preliminary trial are optimistic then you have reason to expect a more rigorous trial might give similar results, so the expense might be worth it. You may even be able to get some funding to help with a more rigorous trial on the basis that the preliminary results were positive.


This is what Tuatara Natural Products has been doing with their weight loss pill “Satisfax”. They have completed a low quality preliminary trial on their product, which has been colloquially dubbed the “Fat Mates” trial. Although I don’t believe it has yet been published in a journal at the time I’m writing this article, it was registered retrospectively in the Australian New Zealand Clinical Trials Registry: Effect of the dietary supplement Satisfax (Registered Trademark) on weight loss in overweight volunteers. Some information on the data in the trial can be found on their website as part of an analysis by Dr Chris Frampton: Analysis of Satisfax® Clinical trial

As you can see on the trial registration page, this was an uncontrolled trial on overweight adults. The original plan was to recruit 100 volunteers with the hope that at least 60 will complete the trial. I have to say I’m a bit confused about how many people were in the trial, as apparently the recruitment was increased to 200 applicants after applications opened (a change that has not been reflected in the trial’s registration) yet apparently about 400 people applied. One article claims there were 200 participants, a later media release from Tuatara Natural Products seems to imply 100 were recruited, and the analysis of the trial says there were only 81 participants. Either way, 81 participants completed the full 8 weeks, and 52 of them took the recommended dose for the whole duration of the trial.

If there were 19 or 119 participants who didn’t complete the trial, the statistical analysis seems to ignore them with no justification given. This is unusual – a 19% drop out rate is significant and shouldn’t be swept under the rug. A lot of the time Tuatara also seems to ignore the 29 participants who didn’t drop out but also didn’t take the full dose for the whole duration.

The Science Media Centre posted the responses of 2 experts, Associate Professor Andrew Jull and Professor Thomas Lumley, to a press release from Tuatara Natural Products in February. It’s a good analysis of some of the weaknesses with the study, and I recommend you read it: Kiwi diet pill claims – experts respond

This trial was uncontrolled, and therefore also unblinded and unrandomised. As Professor Lumley explains, this is a problem if you want to draw strong conclusions from its results. It is of low methodological quality, but that’s okay. There is no problem with doing less rigorous trials first if they’re done in order to determine if more rigorous trials are necessary. Dr Glenn Vile, Chief Technical Officer of Tuatara Natural Products and the principal investigator for this study, wrote the following in a comment on a post on the “Fat Mates” trial by Dr John Pickering:

The Fat Mates trial was designed by clinical trial specialists to generate information about the Satisfax® capsules that would help Tuatara Natural Products plan a larger and longer double blind, cross over, placebo controlled trial.

We will use this information to proceed with the next clinical trial, but in the meantime we were so excited the weight loss achieved by most of our Fat Mates was much greater than the placebo effect seen in other weight loss clinical trials that we decided to launch the product so that anybody who is overweight can try Satisfax® for themselves.

Dr Glenn Vile

I think the first part of what I’ve quoted above describes exactly what Tuatara Natural Products should be doing. They’ve conducted their low quality trial, and intend to use its results to proceed with a larger, longer, and more rigorous clinical trial. This is the right way to proceed – they now have an indication that their product might be effective, so they should do the research to find out.

The problem is that that’s not all they’re doing. After performing only a small low-quality trial, they’ve released their product for sale online and have been making a lot of noise about it. In my opinion, they’ve been significantly overstepping the results of their clinical trial. For example, in his comment Dr Vile also said:

our initial trial has shown [Satisfax] to be extremely effective in some overweight people.

Dr Glenn Vile

In their media release on the 20th of February, they reported the average weight lost only by the 52 participants who took the full dose to completion (rounded up from 2.9 kg to “close to 3kg”) but not the average weight lost by all participants. They then reported in bold that the top 26 participants lost more weight, and the top two participants lost even more weight than that!

This cherry picking of the best results appears to have been part of Tuatara Natural Products’ marketing strategy for at least a few months now. In January, Stuff published an article on the trial highlighting the single person who lost the most while participating in it: Blenheim ‘fat mate’ loses 13.5kg in 8 weeks.

That article particularly highlights the person who lost the most weight out of all those in the trial, at 13.5 kg (confusingly, the maximum weight loss reported in the analysis of the trial’s results is 13.3 kg). However, she was one of only 2 participants who lost over 10 kg, and on average the 52 participants who took the recommended dose for the full eight weeks lost 2.9 kg. Losing 13.5 kg is very far from a representative example. I’m not surprised that they didn’t choose instead to focus on the participant who gained 1.2 kg despite taking the recommended dose for the whole duration, but that is actually much closer to the mean change in weight.

The article is, for all intents and purposes, one big testimonial in favour of Satisfax. It was an article, not an advertisement, which is important because in New Zealand it’s illegal to publish any medical advertisement that:

directly or by implication claims, indicates, or suggests that a medicine of the description, or a medical device of the kind, or the method of treatment, advertised… has beneficially affected the health of a particular person or class of persons, whether named or unnamed, and whether real or fictitious, referred to in the advertisement

Medicines Act 1981 Section 58(1)(c)(iii)

This effectively bans all health testimonials from advertisements. I think this is a good part of the law, as testimonials can be both very convincing and completely misleading; a quack’s dream. Banning them should force businesses to instead focus on the results of research on their products, but this hasn’t stopped Tuatara Natural Products from getting stories written about the most extreme testimonials they could find from people who have lost weight at the same time as they were taking Satisfax.

More recently, Tuatara Natural Products has put out a press release multiple times (at least on the 20th of February and again on the 4th of March) that I think rather oversteps the results of their small preliminary trial:

A NEW ZEALAND SOLUTION TO A GLOBAL PROBLEM A little pill is providing an exciting answer to one of the worlds greatest and fastest growing problems: Obesity.A NEW ZEALAND SOLUTION TO A GLOBAL PROBLEM

A little pill is providing an exciting answer to one of the world’s greatest and fastest growing problems: Obesity.

Press Release – Tuatara Natural Products

I simply don’t think they are at all justified in saying that their new product is “providing an exciting answer to… Obesity”. They are putting marketing ahead of science, and that’s not okay.


Another company that seems to put marketing before research is 1Above. They make a drink which they claim can help you recover faster from jet lag, and have recently been in the news for signing a sponsorship deal with the fantastically successful golfer Lydia Ko.

At the end of that article about their sponsorship deal the reporter, Richard Meadows, made some comments regarding the science behind jet lag relief products and asked some good questions of 1Above’s CEO, Stephen Smith (emphasis mine):

[1Above’s] product contains a mixture of vitamins B and C, electrolytes, and Pycnogenol, a pine bark extract.

The efficacy of flight drinks to combat the effects of jetlag is unproven.

Late last year pharmacists were warned after the Advertising Standards Authority upheld a complaint against an ad saying a homeopathic anti-jet lag pill really worked.

[1Above CEO Stephen] Smith said 1Above would not be doing clinical trials, which were highly expensive and not necessary.

“What we tend to use is testimonials from people who have used the product and swear by it.”

Smith said the key ingredient, Pycnogenol, had itself had been tested in dozens of trials, including its effects on reducing jetlag.

Kiwi startup 1Above signs golf No 1 Lydia Ko

Yes, you read that correctly. The CEO of 1Above literally said that they won’t be doing clinical trials because they are “not necessary” and that they use testimonials instead.

As I said before, using testimonials to promote a therapeutic product, like a drink to help you recover faster from jet lag, can be both very convincing and completely misleading. There’s a reason why testimonials implying health benefits are illegal in New Zealand, and I hope that 1Above’s marketing will not violate this regulation.

Not all testimonials are prohibited, of course. It’s entirely acceptably to provide a testimonial from someone who thinks their drink tastes great, or that they provide great service. Basically anything for which a single person’s experience can provide a useful insight. Therapeutic effects, almost without exception, do not fall into this category, which is a big part of why we need to do clinical trials in the first place. If they quote someone in saying that their product helped them recover faster from jet lag, they may be in danger of breaching the Medicines Act.

For example, I’d expect they probably shouldn’t use a testimonial that says this:

Testimonial on the 1Above website, collected 2015/03/05

Testimonial on the 1Above website, collected 2015/03/05

On their website, 1Above currently does refer to research on one of the ingredients in their product, “pycnogenol”. Professor Lumley recently wrote a post about this on his other blog, Biased and Inefficient, regarding these studies and how they are used by 1Above: Clinically Proven Ingredients

I recently contacted 1Above to ask about some discrepancies I found between the abstract of the study they cited for showing pycnogenol reduced the duration of jet lag and their description of it on their website:

I was interested to see the claim your company made that Pycnogenol® has been shown to support circulation and reduce the length and severity of jet lag.

I have found the study “Jet-lag: prevention with Pycnogenol. Preliminary report: evaluation in healthy individuals and in hypertensive patients” that is mentioned on your website as the source for this claim, but I am only able to access the abstract of this preliminary report. Unfortunately, as far as I can tell, the study protocol didn’t involve blinding of participants or researchers.

The participants in the study took 50 mg Pycnogenol 3 times per day, but I haven’t been able to find out how much is contained in your products. Is this information available anywhere on your website? I notice the study also says the participants took this regimen for 7 days, starting 2 days prior to departure. Is this comparable with how your product is intended to be used?

I also noticed some differences between the description of the study and its results between the abstract and your website, I would be grateful if you could explain to me the source of these differences.

The abstract states the control group took, on average, 39.3 hours to recover and the experimental group took, on average, 18.2 hours to recover. However your website reports these as 40 and 17 hours respectively.

Also, your website states that the study involved 133 passengers (it’s not clear from the description on your website if they all took Pycnogenol or if some of them were in the control group) who reported the time it took them to recover from jetlag. However, the study’s abstract states that in the first experiment, which is the only one that involved the reporting of the time taken to recover from jetlag, only involved 68 participants – 30 in the control group and 38 in the experimental group.

I would be grateful if you could explain these differences to me, and if you could send me any other relevant scientific information that supports this claim.

To their credit, since receiving my message they did update their website to fix the discrepancies in the reported number of participants and times taken to recover from jet lag, and their CEO replied to thank me for pointing these discrepancies out.

However, they didn’t respond to my other questions about the amount of pycnogenol in their products or the study involving the participants taking pycnogenol for 7 consecutive days, starting 2 days before their flight, which is inconsistent with how 1Above recommends their products be used.

This is just one more company basing their marketing on preliminary trials instead of using them as the basis for research that could actually answer the question of whether or not a product is useful. Worse than Tuatara Natural Products, they even go so far as to consider clinical trials “not necessary” and apparently intend to rely on testimonials instead. It would be much more appropriate for them to spend some of their $2.4 million annualised income on researching their product rather than paying for a sporting celebrity to endorse them.


I try to make my rants constructive, so I want to end this article with the question “What can we do about this?”. If you have any suggestions, I’d love to hear them in the comments section.

I think the most important thing that anyone can do to address this problem is to ask for evidence. If you see a claim made about a product that you think you might buy, then get in touch with the company selling it to let them know you’re considering buying it and to ask for evidence. If they don’t have a good enough answer, then let them know that’s why you won’t be buying their product. If they give you evidence to back up their claim, then great!

The UK organisation Sense about Science has created a website for just this purpose: www.askforevidence.org

Asking for evidence doesn’t have to be a big deal, involving a formal letter or anything like that. When you see a weight loss product advertised on a one day deal site, a copper bracelet that apparently offers pain relief advertised on a store counter, or a jet lag cure promoted on Twitter, make your first response be to politely ask for evidence.

This isn’t a problem that’s going away any time soon. As consumers, we deserve to be able to make informed decisions about the products we buy, and when companies put marketing before research it becomes harder to make these informed choices. But if we work together then we can encourage companies like Tuatara Natural Products and 1Above to improve their behaviour and attitudes toward marketing and research.

Let’s turn “what’s the evidence?” into a frequently asked question for all companies that sell therapeutic products.

How Well Do You Know Your Moon?

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Phil Plait, who writes the wonderful Bad Astronomy blog over on Slate, noticed something interesting in a recent episode of The Simpsons:

Photo by 20th Century Fox Film Corp.

Photo by 20th Century Fox Film Corp.

To the untrained eye, nothing about this cartoon image is likely to seem unusual. But if you spend a lot of time looking at the sky, and you have the additional context that this scene occurred in the evening, then the Moon is actually quite revealing.

(For those of you thinking “it’s just a cartoon, don’t expect it to be accurate”, I realise that. But if you decide to treat it as though it must be accurate then it can be interesting to think about so bear with me.)

To understand why that is and how we know, we have to have a think about how we look at the Moon.

The Moon orbits the Earth in a plane that’s pretty well aligned with the plane of the solar system. This means if you drawn a line in the sky tracing the path of the Moon, you’ll also find the Sun and the planets roughly on that line. This is why we experience solar and lunar eclipses, which happen when the Sun and Moon are lined up particularly well with the Earth. Because the line is where eclipses happen, it’s called the ecliptic by astronomers.

Earth’s axis is tilted by 23.5° relative to this plane, but if you’re not too close to the equator (for example, if you’re in New Zealand or the USA) then you can say that if you projected the equator into the sky it would be in roughly the same position as the ecliptic. If you’re in the southern hemisphere, that means it’s to the north, and if you’re in the northern hemisphere, it’s to your south.

So, if you’re looking at the Moon from New Zealand, you must be looking roughly to the north. If you’re looking at it from the USA, you must be looking roughly to the south. This also means the Sun and Moon, moving east to west across the sky as the Earth spins, appear to move right to left from the southern hemisphere and left to right from the northern hemisphere.

When we look at the Moon, we’re seeing the same thing no matter where we are on Earth except for one thing: which way is “down”. The “bottom” of the Moon in the part that’s closest to the horizon. If you travel to the other hemisphere, and you’re familiar enough with the Moon, you may notice that it appears upside down. That’s because the direction of “down” has swapped – from roughly north to roughly south (or vice versa if you’ve travelled from north to south). If you want to see what the Moon looks like from the other half of the world, you have to bend over backwards (or lie on the ground). This is also why the Moon will appear to have rotated if you compare it when it’s rising to when it’s setting.

One more thing: the Moon orbits us in the same direction as we’re spinning, which means it moves across the sky slightly slower than the Sun. Each day, the Moon rises roughly 50 minutes later than the day before, so that over its 28 day cycle of phases this sums to 24 hours.


Now, getting back to that image from the Simpsons episode. That scene was apparently in the evening, and the Moon is low on the horizon. That means the Moon must either be about to set or have just risen. If it had just risen after sunset, then it was recently full (because a full moon rises at sunset and the moon rises later each day), which means its phase would be a waning gibbous. Waning refers to the fact that it is on its way from being full to being new, and a gibbous is the shape made by a circle with a crescent cut out from it.

In the picture, the Moon is obviously a crescent, so it can’t have just risen. If it’s just about to set after sunset, then is must just have been a new moon (because a new moon sets at sunset and the moon rises later each day), which means its phase would be a waxing crescent. Waxing refers to the fact that it is on its way from being new to being full, and the crescent refers to its curved shape.

Another thing we know about the Moon is that its lit side always faces the Sun. For example, the lit side of a full moon points right back at us, because from its perspective the Sun shines on it from behind us. If the Sun has just set, and the Moon is just about to set as well, then the lit side of the Moon must be facing the Sun. As the Sun sets in the west, this means the lit side of the Moon should also be facing west if it is a waxing crescent.

In the picture from the Simpsons, which we’ve established should be a waxing crescent, the lit side of the Moon is facing to the left. But remember, if you look at the Moon from the northern hemisphere you must be looking to your south, so west should be on your right. So if the waxing crescent moon is lit on its left, then you must be looking north to see it, which means you’re in the southern hemisphere.


Unfortunately, a lot of pop culture doesn’t get the Moon and its phases right. I know it’s such a tiny thing, and typically when they don’t get it quite right I can’t say I mind too much (although I often can’t help but notice), but I really love it when they put in that extra bit of effort to get it correct.

Almost all video games with day/night cycles where you can see the sky have the Moon orbit in 24 hours. Some of them include phases, although technically if your Moon always rises at sunset then it should always be full. I can forgive video games fairly easily though, I’m probably the only person who cares and I understand it could take significant development time to get proper lunar phases in. The only example I can think of that gets it right is Kerbal Space Program, where accurate celestial mechanics is an important part of the game.

Some books have issues with the Moon as well. Last year I was reading the book Ship of Theseus, and one scene describes the protagonist seeing the crescent moon rise as it gets dark. But crescent moons never rise as the Sun sets, light simply doesn’t work that way.

Movies often have trouble with it as well. The worst offender I’ve seen is the final scene from the movie Cloud Atlas:

Final scene from the movie Cloud Atlas

Final scene from the movie Cloud Atlas

Remembering that the lit side of a moon points towards its sun, and this applies even with multiple moons, that image implies some very strange things about the nature of light.

I’d love to see more media put more effort into getting this right. I know that one author who paid particular attention to this detail was J.R.R. Tolkien, who tried hard to get the phases of the Moon consistent with his dates when writing The Lord of the Rings and apparently did a pretty good job of it too.

My favourite example of well-documented in-depth world building doesn’t involve the Moon but I’d like to share it here anyway. My brother Jeremy (who’s currently working as a concept artist at Weta Workshop, a job he got soon after leaving Uni) worked on creating a deep and internally consistent fictional history to earn his masters degree in 2013. He ended up creating a fake National Geographic article from 1932 recounting the reporter’s visit to the settlement of Elkwood. The article only scratched the surface of all the thought he put into the work, if you want to see what he came up with you can read both the article and his exegesis explaining his research methods here: Creating Elkwood: building an alternate history

When fictional worlds are deep and internally consistent they become that much more enriched. If you know of any that have represented lunar cycles particularly well (or particularly poorly) let me know in the comments.

Irradiation of Food and Compulsory Labelling

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Queensland Fruit Fly | Photo by James Niland

Queensland Fruit Fly | Photo by James Niland

Biosecurity is a big issue for New Zealand. Being a group of islands fairly isolated from all other landmasses and having quite a unique native ecosystem (many native birds with no native mammalian predators and few native land mammals), we have a lot to lose from introduced species. There are also biological threats to industry that we have to try really hard to keep out of the country, such as Queensland fruit fly. There’s good reason why the Ministry for Primary Industries (MPI, formerly MAF) reacted so strongly when one of these flies was found in Whangarei in April 2014. If enough of these flies made it into New Zealand to self perpetuate, they could cause massive damage to New Zealand’s $5 billion horticulture industry.

In order to kill off any biosecurity risks, including disease-causing organisms and foodborne pests, various treatments (also known as “phytosanitary actions” when used on plant products) can be used when importing products into New Zealand. Different products that can be imported each have an Import Health Standard (IHS) that documents the process of importing them.

For fruit and vegetables being imported, they need to come with a phytosanitary certificate from their country of origin, to say that either they have been inspected by someone from MPI and they couldn’t find any pests, they come from a certified pest free area, or they have been treated to kill any pests. A sample of the products is also inspected by MPI when arriving in New Zealand, and if any pests are found then the products will have to be treated if they are to enter New Zealand.

The treatment used depends on a few things, such as what pest was found that they’re trying to kill. For example, assuming I’m interpreting the IHS correctly, if Thrips palmi is found in a shipment of capsicum from Australia it would be fumigated with methyl bromide at 32 g/m3 for 2 hours. Whereas if Conogethes punctiferalis were found, then the capsicum would be irradiated with a minimum dose of 250 Gy (Grays; 1 Gray is equivalent to 1 Joule of energy absorbed per kg of food).

EDIT 2015/02/01:

The previous paragraph is incorrect. Those treatments are the ones that should appear on the phytosanitary certificate, having been performed in the country of origin. The treatments done if a pest is found when they arrive in New Zealand are determined in the Approved Biosecurity Treatments Standard. So for fresh fruit and vegetables (page 37), if insects except for fruit flies (not slugs and spiders) are found then they have to be fumigated with methyl bromide at a particular rate and temperature for a particular duration (presumably depending on the pest and the produce). Looking at this standard, it seems human food doesn’t get irradiated if pests are found when it arrives in New Zealand. According to MPI’s list of treatment providers (direct PDF download), there is only one facility in New Zealand able to provide food irradiation, which is in Wellington.


Methyl bromide is an insecticide, and it’s also recognised as an ozone-depleting substance. Because of this, its use is tightly controlled. It’s only allowed to be used for a few specific purposes, one of which is quarantine, and New Zealand has to provide statistical data to the Ozone Secretariat on the annual amount of methyl bromide that we use. It’s nasty stuff – even skin contact with high enough concentration of the gas can cause severe blistering – but after being used to fumigate food it apparently dissipates fairly rapidly. There are some objects that MPI won’t fumigate with methyl bromide for various reasons, which are described in their info sheet I linked to above.

Irradiation is quite different. Using either Cobalt 60, x-rays, or an electron beam food is blasted with a specific amount of ionising radiation. Cobalt 60 is a radioactive source of this radiation, but as it emits gamma rays instead of neutrons it doesn’t make anything else around it radioactive. Both x-rays and electron beams are created by non-radioactive sources and can be switched on and off.

When food is irradiated, the process kills any organisms that are living in the food, including disease-causing organisms and pests. The food does not become radioactive, instead it will just be slightly warmed from the energy it absorbs. Also, the radiation will trigger some chemical changes, but these occur only in amounts comparable to heat treatments. In this way it’s quite similar to the process of pasteurisation used to make milk safe to drink.

In 2010, following an extensive literature search, the European Food Safety Authority (EFSA) published their Scientific Opinion on the Chemical Safety of Irradiation of Food. They found that the new evidence published since their previous decision in 2003 wasn’t enough to change their opinion that “there is not an immediate cause for concern” regarding the safety of irradiated food.

Irradiated Food symbol | FSANZ

Irradiated Food symbol | FSANZ

The strongest negative evidence they found seemed to be a case in which cats ate a diet consisting largely or entirely of highly irradiated (25.7 to 53.6 kGy, i.e. 100 to 200 times as much as in the capsicum example from earlier) cat food and subsequently suffered from leukoencephalomyelopathy (LEM). This evidence doesn’t necessarily have any relevance to humans though; in another report dogs ate the same pet food and didn’t exhibit LEM. Also, as the incident was only linked to one specific lot of one specific brand of pet food it’s unclear if irradiation was the culprit at all.

Even though irradiated food appears to be entirely safe to eat and not significantly different from food that hasn’t been irradiated, it is currently compulsory to label irradiated food in New Zealand under the Australia New Zealand Food Standards Code Standard 1.5.3.

MPI’s Food Smart website has an informative page on food irradiation. It’s quite clear on several important points (you can read their full answers on the page):

Does irradiation change food?

At the approved doses, changes to the nutritional value of the food caused by irradiation are insignificant and do not pose any public health and safety concerns.

Some treated foods may taste slightly different, just as pasteurized milk tastes slightly different from unpasteurized milk. There are no other significant changes to these foods.

Does irradiation make food radioactive?

No.

Is it safe to eat irradiated food?

Yes. Irradiation of food does not make the food unsafe to eat.

The World Health Organisation, the Food and Drug Administration in the US and the American Medical Association all agree that irradiated food products are safe to eat.

The FDA’s page on food irradition has an informative “Debunking Irradiation Myths” inset:

Irradiation does not make foods radioactive, compromise nutritional quality, or noticeably change the taste, texture, or appearance of food. In fact, any changes made by irradiation are so minimal that it is not easy to tell if a food has been irradiated.

FDA

It also states that:

FDA has evaluated the safety of irradiated food for more than thirty years and has found the process to be safe. The World Health Organization (WHO), the Centers for Disease Control and Prevention (CDC) and the U.S. Department of Agriculture (USDA) have also endorsed the safety of irradiated food.

FDA


Earlier this week, the Herald published an article by Sue Kedgley on irradiated food. In my opinion that article is a load of unscientific scaremongering. Here are a few excerpts that appear clearly intended to be more emotive than informative:

But irradiated food is anything but fresh. It’s been exposed to radiation doses that are between three and 15 million times the strength of x-rays. The Brisbane radiation facility uses Cobalt 60 to irradiate food, a radioactive material that is manufactured in Canadian nuclear reactors, and shipped to Australia in special unbreakable steel canisters.

I visited the Brisbane irradiation facility in 2004. Boxes of food travel by conveyor belt into an irradiation “chamber”. The irradiation process breaks down the molecular structure of food; destroys vitamins in food, and creates free radicals and other “radiolytic compounds” that have never been found in nature, and whose effect on human health is not known.

Also of concern is the fact that in 2008 the Australian Government was forced to ban irradiated cat food after more than 80 cats died or became seriously ill after eating irradiated cat food.

This begs the question – if cats can die, or become ill from eating irradiated cat food, what could be the cumulative effect on humans of eating significant quantities of irradiated food? There’s no benefit to New Zealand consumers, and only risks to our growers, from imported irradiated produce.

Her comment that irradiation “breaks down the molecular structure of food [and] destroys vitamins in food” is quite at odds with the evidence that the nutritional content of irradiated foods are not changed significantly. This statement is entirely blown out of proportion, it’s like describing a papercut as having “ripped my flesh apart”.

She also doesn’t mention any of the details regarding the cat food incident, such as that their diet consisted largely or wholly of food irradiated 100-200 times as much as human food generally is, that the same food seemed to have no negative effects when eaten by dogs, or that the incident was only linked to one specific lot of one brand of cat food. How it relates to humans consuming irradiated food, if it has any implications on that at all, is not clear but her reaction is just scaremongering.

Her article appears to have been prompted by a couple of changes to the regulations that are being considered:

FSANZ is currently assessing Application A1092 seeking permission to irradiate twelve specific fruits and vegetables. A call for submissions on our assessment is expected to be released in the second half of 2014.

Food Standards Australia New Zealand | Food irradiation

FSANZ plans to start work on recommendation 34 (that the requirement for mandatory labelling of irradiated food be reviewed) later this year.

Food Standards Australia New Zealand | Labelling review

Here’s a link to Application A1092. That page specifies the 12 fruits and vegetables involved as apple, apricot, cherry, nectarine, peach, plum, honeydew, rockmelon, strawberry, table grape, zucchini, and scallopini (squash).

Ms Kedgley describes these potential changes as:

the Government is about to approve the importation of irradiated apples, peaches, apricots and nine other fruit and vegetables from fruit fly-infested Queensland.

If they succeed, retailers will be able to sneak irradiated produce into the food chain, and it will be sold, unlabelled, as if it was “fresh”.

Surely consumers have a right to know whether the apples they are buying are fresh, or have been imported from Queensland and exposed to high doses of radiation to sterilise them and kill off potential fruit fly lava?

Red apple

Red apple | Photo by Abhijit Tembhekar

Looking at the IHS for fresh fruit and vegetables (direct PDF download), you can see that honeydew, rockmelon, strawberry, grape, zucchini, and scallopini are already included, they just aren’t yet allowed to be treated via irradiation. As far as I can tell the others – apple, apricot, cherry, nectarine, peach, and plum – can’t currently be imported from Australia.

Given that the entire function of irradiating food is to kill unwanted organisms such as Queensland fruit fly larva, I think it seems disingenuous of Ms Kedgley to repeatedly refer to it as though allowing these products in will bring Queensland fruit fly to New Zealand. The reason why we can’t currently import these products is because of that fly, but allowing them to be treated by irradiation would let us safely import them.

On the issue of labelling, this seems to be a very similar issue to compulsory labelling of genetically modified foods and foods containing genetically modified ingredients (this is currently mostly compulsory in New Zealand). In that case, as with food irradiation, opposition generally seems to be driven by idealogical issues with the technology used or misinformed beliefs that it’s somehow unsafe, even though it’s entirely safe. It’s effectively a lose/lose situation – if labelling isn’t mandatory then “What are they trying to hide?” but if it is mandatory then “They wouldn’t have to put it on the label if it wasn’t bad for you”.

If you want to oppose the addition of those 6 new fruits to the list of foods that can be imported from Australia on the basis of supporting New Zealand farmers then okay, that’s a different argument altogether that has nothing to do with irradiation. There doesn’t seem to be much reason to oppose this on grounds that irradiated food may be unsafe to eat though.

Foods are not allowed to be irradiated unless they have been through a pre-market safety assessment process conducted by FSANZ

http://www.foodsmart.govt.nz/elibrary/food_irradiation_.htm

Given that irradiated food doesn’t appear to be unsafe, is there really any reason to keep labelling of irradiated food compulsory? If anything, isn’t compulsory labelling most likely to make people think that means it’s bad or unsafe when it isn’t? If it’s all about allowing consumers to make informed decisions, that would be rather counterproductive.


I’m lucky enough to know someone who’s a food scientist. Claire Suen has an MSc in Food Science from the University of Auckland, and I contacted her to ask for her thoughts on the process of food irradiation. Here are some of the things she had to say in response to some of the common arguments opposing food irradiation:

[Irradiation] changes the nature of food: carcinogenic, loss of nutrients etc.

So does cooking, burning toast, deep frying, etc. Irradiation causes minute changes to the food and some loss of nutrients such as vitamins, but these have all been thoroughly researched and the results are readily available. In short, no significant changes to the food have been found.

Regarding the lost of nutrients, I usually point out to people that this is negligible considering the nature of the food.

FSANZ have published some comprehensive risk assessment reports in the past, and using the latest report on tomato as an example:

Nevertheless, even assuming an upper estimate of vitamin A and C loss of 15% following irradiation from all fresh tomatoes, capsicums and tropical fruits (with existing irradiation permissions), estimated mean dietary intakes of these vitamins would decrease by 2% or less and remain above Estimated Average Requirements following irradiation at doses up to 1 kGy, with dietary intake typically derived from a wide range of foods.

The impact of cooking and storage time on nutrients in food is far more severe than the effects of irradiation.

Here’s a link to that FSANZ report on Irradiation of Tomatoes & Capsicums (direct DOC download)

There are better alternatives

Irradiated food saves cost for the manufacturers/importers/supermarkets because it eliminates otherwise costly alternatives.

Methyl bromide for example, is not 100% effective against insect eggs and larva, particularly if they are buried inside the fruit or seed. Storage pest such as beetles and weevils are extremely difficult to control and often need a combination of methods such as heat treatment, and fumigation. For herbs and spices, irradiation can be used to control pathogens such as salmonella and E. coli. No other method is as effective. But because consumers in NZ are against it, we have to use methods such as steam sterilisation and heat treatment, which impacts on the flavour and quality of the product. Consumers sometimes do not understand the amount of work MPI and the importers have to do to make sure foreign organisms do not get in the country. All it will take is a slack importer, a missed check, or an incomplete fumigation. What of the products that have to be destroyed due to microorganism contamination, or spoilage? If they had been irradiated, this wastage wouldn’t happen.

We don’t need irradiation since we can just buy local products

Unfortunately NZ is a small country and we have limited produce. I’m not saying we can’t get by without EVER importing anything, but, it seems to me that these people don’t realise just what the consequences are. Sure, we don’t have to import apples, or nectarines, but what about the tropical fruits not grown locally? Or spices? Let’s not eat fresh mango again, or curries, since pepper used to be worth its weight in gold because it’s not grown in Europe. We can’t get away from importing and by not using irradiation, NZ business have to use more costly, and less effective alternatives, which means all these cost are passed ultimately onto the consumers. I understand people’s concern that this will hurt local producers, but that is a question of economy and has nothing to do with the safety of irradiated food.

Now coming to the question of labelling

Unfortunately, it’s a no-win situation. If we label then consumers will think something is wrong with it, if we don’t label it’s as if we are hiding something. There is simply no way to beat that logic. In my opinion, if we don’t label products which have been heat treated, or fumigated, then we shouldn’t need to label for irradiation. But because consumer backlash is so strong, I wouldn’t want to give haters a chance to play the “Ah ha you are hiding something” or “give me my freedom of choice” card.

I say let’s put irradiated fruits on the shelves and label it as such so I can chose to buy it because it will be cheaper and better!

I think that last point says it all really. As a food scientist, Claire is quite familiar with the topic of food irradiation, and she would choose to preferentially buy irradiated food because she understands the process to be safe, effective, and not detrimental to the food.

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