Zint Oure Grass-Fed Collagen Peptides - Unflavored is derived from 100% pure, non-GMO, grass-fed bovine hides. The natural raw materials are purified and extracted in a way that preserves their vital amino acid profiles, including L-arginine, glutamine, proline and glycine. Completely neutral in flavor and texture, this powder is highly bioavailable and dissolvable in cold water.