Especially foods that have a high glycemic index (bread, rice, pasta, potatoes, sugars of all kinds) and therefore causes a significant secretion of insulin to lower blood sugar by controlling the storage of energy.
An important book that provides further physiological and historical arguments of the other anthropological argument books: Prehistoric power, Thierry Souccard, which is why agriculture (Neolithic: -10000 years) and grain production have upset food too quickly and caused bone deficiencies, diabetes, obesity, tooth decay and other diseases unknown to the Paleolithic (2.5 million years).