The sum is not always equal to its parts. Unlike many collagen "supplements" out there, we at Universal don't add individual amino acids found naturally in collagen and call it "collagen" (glycine, praline and hydroxyproline are naturally found in collagen.) While collagen is abundant in our bodies, it's unique. You can't just reproduce it and its benefits by combining different amino acids and calling it a day. That's why we put the real thing in each and every bottle. We start with the cleanest bovine collagen that's 99% pure. Odorless, Unflavored, Unflavored.