What is hydroxyproline Description L-4-Hydroxy Proline, (also referred to as Hydroxy Proline or Hydroxyproline), is an amino acid, a building block of protein, made by modifying another amino acid called Proline. It is the primary component of collagen, a fibrous protein found in the dermis of the skin that gives skin its structural support and youthful firmness. Collagen is also the major component of connective tissue, the material that provides structural report for most organs in the body. In the skin, collagen is synthesized by cells called fibroblasts. This process requires vitamin C. Hydroxyproline also plays an important role in wound healing and is a vital component of bones and teeth. Hydroxy Proline is a major component of the protein collagen. Hydroxy Proline and proline play key roles for collagen stability. l hydroxyproline for skin is found in few proteins other than collagen. For this reason, hydroxyproline supplement content has been u...