I have just read a British Medical Journal (BMJ) article, by Nigel Hawkes, emailed to me by a colleague in the USA entitled ".
"Take dietary truths with a pinch of salt". I would happily re-post the article in it's entirety but I have succumbed to fear of copyright infringement. Here is the link to the
abstract.
The key focus of the article is the concept of changing government nutritional recommendations. Beginning with the discussion of margarine as the more favourable alternative to butter, as recommended by (unnamed) Doctors dating back to the 1950's, the article continues to talk about more recent research unveiling the content of trans-fats in hard margarines, and then the health risks associated with consumption of trans-fats.
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| Margarine, as deadly as the Nazis!? |
The disturbing figure admitted within the article is that eliminating trans fats over a 10 year period is estimated to prevent 27,000 deaths, gain 570,000 life years and return a cash benefit of £2 billion in England and Wales alone. This is noted to far outweigh the previously thought benefits of 5% reduction in cholesterol concentrations or in systolic blood pressure or a reduction in salt intake of 3g a day.
The article continues:
'Almost every nutritional "fact" is in reality an opinion, often based on poor quality evidence'
then citing a 2011 article by Prasad, et al., in the New England Journal of Medicine which suggests that around 13% of papers published over the course of a year amount to reversals of previously accepted beliefs. Not wanting to accept one articles take on another I checked this: Prasad, et al., carefully define rev
ersal "to signify the phenomenon of a new trial—superior to predecessors because of better design, increased power, or more appropriate controls—contradicting current clinical practice". The primary article then (conservatively - in my opinion) estimates that it takes about a decade for advice to be reversed.
I guess my point in this blog is to return the palaeolithic theme I have discussed previously. We seem to take on new evidence as gospel with apparent disregard of where it is from. Ultimately showing greater trust for the government and potentially biased health and medical professionals whose research is often funded by large multi-national corporations. My affiliation with palaeolithic diet and lifestyle is derived from the 10,000 years of science, of evolution, not the last couple of thousand years (or less) of changes which we are yet to see the noticeable effects from.
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| Imagine that trans fat and margarine is guilty of this! |
As a final summary to all of this, the original article by Hawkes provides an excellent quote:
"The more dominant that guidelines become, the more dangerous they are"
- evidenced by the guidance towards margarine and the likelihood that deaths attributable to trans fats near holocaust proportions, and would likely have been far greater without the suspicions and scepticisms shown by some of the public.
Ultimately this blog aims to heighten awareness of the underlying issues inherent with publication and opinion of the government or government based associations in regard to nutrition and lifestyle variables.
Be well
JF