L-lysine is an essential amino acid which your body cannot make on its own. L-lysine promotes healthy nitrogen balance and calcium metabolism. In addition it helps promote a healthy stress response and inhibits glycation reactions which in turn promotes healthy aging. L-Lysine contains 100 vegetarian capsules enough for a 33-day to 100-day supply depending on your preferred dosage. This gluten-free formula is made with non-GMO ingredients.