Ancestral Supplements Living Collagen Grass-fed, 500mg, 180 capsulesThe cartilage based mixture is a rich source of bioactive growth factors and essential amino acids that act synergistically with type I, II, III, V and X collagen. Unlike other highly processed modern collagen supplements obtained from skin, hooves and horn, our beef collagen fed grass comes from cartilaginous parts of the animal, including the trachea. Many collagen are made from inedible parts, such as skin, hooves and horns, leading to highly