, highest quality, pure usp grade material, l-lysine an essential amino acid, convenient 500mg dose in a tablet form, suitable for vegetariansl-lysine one of the eight essential amino acids (eaas) which cannot be made by our bodies. adequate l-lysine in our diet is therefore critical for optimum physical performance muscle building & muscular endurance. diets that contain little animal protein may be unable to deliver the levels of l-lysine needed by active bodies which is at least 3g per day. vegans & vegetarians are thought to be particularly at risk from lysine deficiency as vegetable proteins contain relatively little lysine. we choose to use usp grade l-lysine a quality suitable for clinical nutrition products so you can rely on this supplement to deliver high levels of pure quality-assured l-lysine. each tablet provides 500mg of free-form l-lysine which is rapidly absorbed into the bloodstream. a convenient high quality lysine supplement; excellent value for money.