L - Lysine is an essential amino acid.When taken together with Arginine L - Lysine can trigger the release of growth hormone.In a study at the University of Rome, 15 healthy male subjects aged 15 to 20 years old, were given 1200 milligrams of
Arginine pyroglutamate combined with L - lysine hydrochloride.In all of them there was significantly elevated biologically active growth hormone from two to eight times.