Chondroitin Sulfate is a sulfated Glycosaminoglycan composed of a chain of alternating sugars ( N-Acetylgalactosamine and Glucuronic acid) . It is one of the main components of cartilage and mucosa layers, forming the connective tissue that holds muscles, nerves and blood vessels together. It is used as a dietary supplement to support cartilaginous tissues and combat various forms of arthritis in humans and animals.