Now Foods, L-Lysine, 1000 mg, 250 TabsProduct Description Lysine is necessary for the production of all protein in the body including hormones, enzymes, and antibodies, as well as carnitine and collagen, which is the structural protein forming all connective tissue such as skin, tendon, and bone. Natural color variation may occur in this product. Product Benefits Essential Amino Acid. Supports Collagen Synthesis*. Healthy Immune Function*. Vegetarian vegan. Dietary Supplement. Ingredients