The Guardian

Forget the headlines - the best diet is the one that works for you | Gideon Meyerowitz-Katz

Do whole grains prevent diabetes? Is moderate drinking good or bad for you? Nutritional studies are more complex than you are told
‘The biggest issue with all nutritional epidemiology studies is something known as residual confounding. Confounding is the process that occurs when issues external to a study are not taken into account’ Photograph: pxel66/Getty Images/iStockphoto

There’s a news cycle that we have all become attuned to. It’s what has led various publications to conclude that broccoli is both causing and preventing cancer, that chocolate is a weight-loss food and a diet killer, and that diet soft drinks, against all odds, are causing people to gain weight.

This is the world of nutritional epidemiology. And it is complex.

Most recently we’ve been told that whole grains  –  the minimally-processed foods such as rye bread that contain high levels of fibre  –  are the key to.

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