Carrots make you friendly and fish makes you intelligent... Popular wisdom has long held that there is a close link between our behaviour and certain mental abilities, and diet. Laboratories across the entire world are in the process of revealing and explaining the influence that food has on the way our brain works: microbiota play a part, as "The gut, our second brain " demonstrated, but that's not all. Scientists are bringing to light all kinds of other connections. How can we protect our brain, and most importantly, what is the ideal food to eat to maintain it and make sure it develops properly?