Vital Proteins Collagen Peptides Powder Unflavoured 567g. Glycine, proline, and hydroxyproline are three essential amino acids that are present in significant concentrations in Vital Proteins collagen peptides. They make up about half of the overall amount of amino acids. Our Vital Proteins collagen peptides include a highly particular combination of amino acids that gives them unique qualities not found in other protein sources. Unflavoured collagen peptides powder, designed to promote a youthful appearance. Vital Proteins® Collagen Peptides Powder 567g is an unflavoured collagen peptides powder. What are Collagen Peptides? Collagen peptides are small, soluble pieces of protein derived from bovine collagen or marine collagen. Vital Proteins' collagen peptides are bioavailable, meaning they can be digested and absorbed by the body easily. Collagen is found in all our connective tissues, tendons, ligaments and bones. As we get older, our bodies become less efficient at producing collagen, which is why we recommend introducing ingestible collagen to your diet.