stimulant found in chocolate, and also in the brain phenylethylamine and serotonin stimulant found in chocolate, and also in the brain drug that stimulates production of endorphins and seratonin brain chemistry stimulant found in chocolate, and also in the brain feeling like a cheerful couple chocolate contains both Serotonin and Phenylethylamine speed up the production of endorphins College Biology Paper on Chocolate and the Brain