Unflavoured . Unflavoured: 100% PeptiPlus® Hydrolysed Collagen (from Bovine). Our Hydrolysed Collagen powder is suitable for anyone looking to increase their daily protein and collagen intake. Pure Hydrolysed Collagen Peptides is made from the highest quality Hydrolysed Bovine Protein available on the market, PeptiPlus® hydrolysed collagen.