Collagen vs Collagen Peptides: What’s the Difference?

Collagen vs Collagen Peptides: What's the Difference? For collagen and collagen peptides that belong to the same protein, collagen is a macromolecular fibrous hard protein, but collagen peptide is a small molecule polypeptide formed after collagen is treated with artificial protease. This is why collagen and collagen peptides are made of the same amino acids but have different properties. What is Collagen? Collagen is the most common protein in mammals and the main extracellular protein in the body. It accounts for about 1/4 of all protein in the body. It is mainly found in fibrous tissues-such as skin, ligaments, tendons, etc. Its concentration is different in different tissues of the body. Approximately 23% of the collagen is contained in the skull, 50% in the cartilage, 64% in the cornea, and 74% in the skin. Collagen is a simple peptide composed of a long helical peptide chain, containing 19 to 105 amino acids, including proline, glycine, hydroxyproline, and hydroxylysine. The molecular weight of collagen is about 300-400kDa. It is insoluble and cannot be absorbed or digested. Collagen is a strong, non-stretchable protein with strong stretch resistance. Together with soft keratin, it provides skin elasticity and strength. Collagen