Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
It is time for scientists to swallow their doubts and press for a proper food policy which will save lives, say John Rivers and Philip Payne of the Department of Human Nutrition, London School of Hygiene and Tropical Medicine