Vital Proteins - Grass-Fed Collagen Peptides with Hyaluronic Acid & Vitamin C - 27 ServingsVital Proteins Collagen Peptides Powder delivers 20g of hydrolyzed type I and III bovine collagen per serving from grass fed, pasture raised cattle, alongside 80mg of vitamin C (from organic lemon juice) and 80mg of hyaluronic acid. Vitamin C is a required cofactor for both prolyl hydroxylase and lysyl hydroxylase enzymes involved in collagen fiber synthesis ensuring the collagen peptides consumed can drive new collagen production optimally.