Chondroitin sulfate is widely used in the treatment of osteoarthritis, where it helps to reduce pain and improve joint function by promoting cartilage repair and inhibiting enzymes that break down cartilage. It is often taken as a dietary supplement to support joint health and slow the progression of joint degeneration. Additionally, it is used in some eye drops to relieve dryness and discomfort by enhancing the lubrication of the ocular surface. In cosmetic formulations, it is included for its hydrating and skin-soothing properties, helping to maintain skin elasticity and moisture. Its anti-inflammatory effects also make it beneficial in wound healing and tissue regeneration applications.