Phenylethylamine hydrochloride is an organic compound commonly sold as a dietary supplement. Phenylethylamine is a colorless, odorous liquid at room temperature and forms a stable salt in the presence of hydrochloride.
Phenylethylamine hydrochloride has a pronounced effect on mammalian nervous systems, altering the flow of nervous system responses. The compound is quickly metabolized by the body, however, with an effectiveness of less than 15 minutes. There is still significant skepticism as to the effectiveness of phenylethylamine hydrochloride as a dietary supplement; as a stimulant, it increases the activity of the body's metabolism, but because it has a short effective period, its cumulative benefits are debatable.