L-lysine is an essential amino acid found in Now Foods' vegan double strength tablets. These tablets contain 1,000 mg of high-quality lysine, which is important for protein production in the body. Additionally, they are suitable for a vegan diet and do not contain gluten or soy. Now Foods' L-Lysine tablets undergo quality and purity testing in independent laboratories. We recommend taking one tablet up to twice a day. Dietary supplements do not replace a balanced and varied diet. Store out of reach of children. Consult your doctor if you wish to use dietary supplements and are being treated for an illness, or if you are pregnant or breastfeeding.