Rob Lyons on the flimsy case for declaring that “eating meat causes cancer”, and the rising tide of buttinsky government and their nudge, hector, prod, and persecute urges:
Meat causes cancer. It’s been said so many times that you’d have to be an idiot not to believe it, right?
The latest confirmation of this apparent common sense was a report published last week in the British Journal of Cancer Research. The authors, from the Karolinska Institute in Sweden, brought together 11 studies — published between 1993 and 2011 — that assessed the risk of pancreatic cancer from eating red meat and ‘processed’ meat. From this meta-analysis, the authors found that red meat increased the risk of pancreatic cancer for men, but not for women, and that the risk of pancreatic cancer rose by 19 per cent for every 50 grams of processed meat consumed.
The simple claim that ‘processed meat causes cancer’ was widely reported after the study was published. However, it would be wrong to assume that such claims about risk are all they are cracked up to be.
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There are so many ways in which the crude tools of epidemiology could screw up the result of studies like this that it is normal for fairly small risks — like the 19 per cent increase in this case — to be treated with a massive pinch of salt. The authors of this study even note: ‘All studies controlled for age and smoking, but only a few studies adjusted for other potential confounders such as body mass index and history of diabetes.’
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So, to sum up: the association between processed meat and pancreatic cancer is so weak it might well be a mirage; the increased risk might not be caused by the processed meat itself; and even if it is, the risk is so low that it’s really not worth bothering about. Yet still we are advised to consider cutting down on our red meat and processed meat consumption. Life is, frankly, too short to miss out on such tasty foods on the slim chance that we might lose a few years of life in old age.
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Now that the precedent has been set for the government to lambast those who engage in unapproved habits, it’s open season on any habit that a campaigner or columnist disapproves of. Ban it! Tax it! Make them get a prescription for it! Deny them medical care! Ellen’s article is objectionable but it only follows the remorseless logic of so many others.
There is another lesson from the meat-and-cancer story: at a time when all sorts of dubious claims are made based on junk science and dodgy statistics, only some panics get wide publicity; others just pop up and disappear again in a matter of hours. The difference is that some play to an existing political or media agenda and some do not. The idea that meat causes cancer appeals to health busybodies, politicians scrabbling around for a sense of purpose, vegetarians who can’t win a moral argument about animal rights, and environmentalists who have failed to convince us that increasing the ‘human footprint’ — by wanting to eat more meat, for example — is killing the planet.
