The headline of a recent Los Angeles Times article is, “No yolk: eating the whole egg as dangerous as smoking?” The question mark is meant to convey uncertainty or surprise, or perhaps both. The article represents much of what is wrong with science and health reporting by mainstream media.
The news report is based upon an article published in Atherosclerosis – Egg yolk consumption and carotid plaque. The study is highly problematic in ways not explored at all in the LA Times article. The researchers surveyed 1,262 patients seen in a vascular prevention clinic, asking them about their egg consumption, smoking history, and other lifestyle factors. They created a measure known as “egg yolk years” – the number of egg yolks consumed on average per week times the number of years of consumption. They compared this to pack years of smoking – packs per day times number of years, a routine method of reporting smoking history.
“Our findings suggest that regular consumption of egg yolk should be avoided by persons at risk of cardiovascular disease. This hypothesis should be tested in a prospective study with more detailed information about diet, and other possible confounders such as exercise and waist circumference.”
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