👉 Chondroitin is a type of protein found in cartilage, which is a soft tissue that provides support and stability to bones. It is composed of two chains of amino acids, each linked by an amide bond. Chondroitin is found primarily in the synovial fluid within joints, but it can also be present in the extracellular matrix of other tissues such as cartilage, tendons, ligaments, and blood vessels.