Eating dark chocolate (70% or more cocoa) improves your mood; tryptophan contained in chocolate helps the production of serotonin which helps the production of endorphins that are the ones responsible of happiness.
It improves the blood supply to the brain and dilates the blood vessels, dark chocolate makes blood flow to the brain much better, it helps improve our memory both in young and adults.
Reduces sweet cravings and this helps not to gain weight.