Amino Night, Value Size, 240 Tablets, Source NaturalsAmino Night Amino Acid for Night time Amino Night is a potent nighttime amino acid formula. Arginine pyroglutamate is an amino acid compound. Taken in combination with L lysine HCl in equal quantities of 1,200 mg, it has been shown to provide up to 10 times more activity than arginine alone. L Arginine is an important factor in muscle metabolism and works to transport, store and excrete nitrogen. L Ornithine is a precursor to L arginine. Supplement