Viridian L-Lysine 500mg is an amino acid (a building block of protein) that is essential for health. As one of the key components of collagen, it can help to restore a smoother, more even, and younger-looking complexion. However, it cannot be manufactured naturally in the human body like other types of amino acids. Therefore, L-lysine, also called lysine, is considered as one of the eight essential amino acids. Viridian L-Lysine 500mg is perfect when taken in conjunction with Ester-C, Echinacea or Oregon Grape.