Your body cannot naturally produce lysine, therefore you must obtain this essential amino acid through the diet or by supplementation. Athletes and exercise enthusiasts take lysine to maintain muscle growth, keep a lean body mass, and properly maintain nitrogen balance in the body. It also supports immune system function, a healthy cardiovascular system, and calcium absorption. Our product is certified kosher, is non-GMO, gluten free, hypoallergenic, and suitable for vegetarians. As a dietary supplement, take 1-2 capsules, 1-2 times daily or directed by your physician. NutraBio L-Lysine Powder - Pure Grade Amino Acid - 500 Grams - Essential Amino Acid - Non-GMO - Gluten-Free - Vegan