The questions related to the feed and diets interest very many. However than stronger will we deepen in a theme, the we will see rather, that on questions "why do we collect weight"? and "what foods do need to be eaten, not to put" on weight? it is impossible to answer absolutely simply. Tim Спектор shows that many seeming solid postulates are errors actually, that potential harm or benefit of many foods is not well-proven and that for achievements of health and slenderness it is needed to understand the individual features of the organism.For all, who is interested in a correct feed, already had time to realize that diets do not work, and wants anymore to know about the organism.In Russian language published first.