Amino acids are important building blocks for a large variety of proteins, and have a wide array of biological functions.?AMINO NIGHT??is a potent nighttime amino acid formula that features the amino acid compound arginine pyroglutamate. 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, and L-Lysine contributes to healthy energy production.*