Sugar is more than empty calories - it is the fuel of evolution, the engine of brain development and the key to cellular health. Behind this effect is the supergene TKTL1, a real sweethorn: It needs sugar to stimulate the formation of new neurons and activate central cell processes. What was long considered an enemy turns out to be an underestimated ally thanks to the groundbreaking research of Nobel laureate Svante Pääbo and tumor biologist Dr. Johannes Coy. The right sweetness - and the right measure - are crucial. Otherwise, sugar makes you fat, stupid and (chronically) sick. This book dispels the myth of "bad sugar" and shows which sugar harms us - and which sugar heals us.