It feels like crystal

December 11th, 2003 by Ben Goldacre in bad science, express, ions, nutritionists, references, statistics | 5 Comments »

It feels like crystal

Ben Goldacre
Thursday December 11, 2003
The Guardian

· As a Guardian-reading science bunny, there’s something slightly galling about the way that right-on beliefs so often seem to cluster together. For example, what’s the connection between torturing political dissidents and crystal magic? Over to the Amnesty Christmas catalogue, and its magnificent Salt Crystal Lamp. “Crystals are one of nature’s most effective purifying minerals. They cleanse the air by absorbing humidity. The process releases negative ions which neutralise positively charged particles of air pollution, creating the fresh air found by the sea or in the mountains.”

· Is Amnesty doing this to give us some small window of experience into what it’s like to be persecuted for your beliefs? Crystals do not absorb water, or at least, if salt crystals did, they would dissolve away pretty quickly, and you’d be left wondering which puddle to stick in the post to demand your money back with. Nor do they work as air fresheners. And you don’t need to spend £34.95 to find that out for yourself.

· And now to Michael van Straten, the Daily Express’s “nutritionist”. “Recent research,” he says, has shown that turmeric is “highly protective against many forms of cancer, especially of the prostate”. Every single day of every single week, you can be sure that a pseudoscientist somewhere is extra- polating merrily away from obscure lab findings to pretend that something is proven and effective. Ridiculous. There are, for turmeric and prostate cancer, speculative lab studies of cells growing or not growing under microscopes, and usually from rats. That’s not enough. Forty years ago this guy called Bradford-Hill knocked out a set of criteria for assessing causality. Read them once: it will only take 20 seconds of your life, and it is the cornerstone of evidence-based medicine, after all, which is what these guys are always pretending to call on. It needs to be a strong association, which is consistent and specific to the thing you are studying, with a temporal association between cause and effect; ideally there should be a biological gradient, such as a dose-response effect; it should be consistent, or at least not completely at odds with, what is already known (because extraordinary claims require extraordinary evidence); and it should be biologically plausible. The Daily Express’s nutritionist has got biological plausibility, and nothing else. Well, that and 20 seconds’ reading to change the habit of a lifetime.


++++++++++++++++++++++++++++++++++++++++++
If you like what I do, and you want me to do more, you can: buy my books Bad Science and Bad Pharma, give them to your friends, put them on your reading list, employ me to do a talk, or tweet this article to your friends. Thanks! ++++++++++++++++++++++++++++++++++++++++++

5 Responses



  1. Anwer Javed Bhatti said,

    November 19, 2005 at 5:50 am

    Dear Sir/Madam,
    We are Manufacturer and world wide Exporter of the following Hamaliya Salt Products.

    Salt Crystal Lamp
    Salt Crystal Tealight Holder
    Salt Crystal Chunks
    Edible Salt
    Bath Salt
    Cotton Cushions
    Cotton Bags and many more Salt Products as per ur demand and requirement.

    Please contact us on ur mail addres or visit our website at
    www.ittefaqco.com

    Thanks for doing this.

    BYE

  2. Derek Bown said,

    November 22, 2005 at 3:51 pm

    and here was me thinking that crystals were actually stable configurations of molecules / atoms… although a salt crystal lamp might sparkle nicely so not a total loss….

  3. ak said,

    November 2, 2007 at 12:38 am

    Not just turmeric. Lots of foods and supplements are being promoted with little scientific support.
    Meanwhile, while we lose 500 men a week, efforts at prostate cancer prevention do not work.

  4. wayscj said,

    November 21, 2009 at 6:50 am

    ed hardy ed hardy
    ed hardy clothing ed hardy clothing
    ed hardy shop ed hardy shop
    christian audigier christian audigier
    ed hardy cheap ed hardy cheap
    ed hardy outlet ed hardy outlet
    ed hardy sale ed hardy sale
    ed hardy store ed hardy store
    ed hardy mens ed hardy mens
    ed hardy womens ed hardy womens
    ed hardy kids ed hardy kids ed hardy kids

  5. viviennewestwood said,

    December 22, 2010 at 2:07 am

    the vivienne westwood
    the vivienne westwood jewellery

You must be logged in to post a comment.