Liver X2121 Highest quality liver supplement Liver X2121 is one of the purest, cleanest, highest quality liver supplement in the world. This natural product is derived from Argentinean cattle. Free of fat, water and connective tissue. Each tablet contains 1950 mg of pure liver (and 1600 mg amino acids). One of the most nutritious supplement available to all body builders. Liver X2121 is very rich in important amino acids, vitamins and minerals.