hydroxyproline

/haɪˌdrɑksiˈproʊlin/
noun
  1. An amino acid found in collagen, important for the structure of skin, bones, and connective tissues.
    • Collagen is rich in hydroxyproline, which gives it strength.
    • Doctors measure hydroxyproline levels to check for bone health.
    • Hydroxyproline helps keep your skin firm and elastic.