Phenylethylamine and Chocolate

Chocolate also contains phenylethylamine, a neurotransmitter that makes us feel more alert and gives us a sense of well being and contentment. Phenylethylamine is known as the "love drug" and is thought be be the reason why chocolate is said to be an aphrodisiac. Phenylethylamine works by stimulating the brain's pleasure centres and reaches peak levels during orgasm.

Researchers found that a session of moderate aerobic activity appears to elevate the body's levels of phenylethylamine, a natural chemical linked to energy, mood and attention. Phenylethylamine may play a role in the "runner's high."