Chondroitin sulfate (CS) is a glycosaminoglycan covalently bonded to protein to form proteoglycans. CS is widely distributed in the extracellular matrix and cell surface of animal tissues. The sugar chain consists of alternating glucuronic acid and n-acetylgalactosamine (n-acetylgalactosamine) disaccharide units connected to the serine residue of the core protein by a sugar-like link region. At present, the main sources of CS extraction are shark, cow, pig and chicken cartilage.

Chondroitin sulfate (CS) is a class of glycosaminoglycans covalently attached to proteins to form proteoglycans. Chondroitin sulfate is widely distributed in the extracellular matrix and cell surface of animal tissues. The sugar chain consists of the aggregation of alternating glucuronic acids and n-acetylgalactosamine, which is linked to the serine residue of the core protein through a sugar-like link region.

Chondroitin sulfate is an important component of articular cartilage. In industrial application, chondroitin sulfate is mainly extracted from cartilage of cattle, pigs, poultry and fish. Chondroitin sulfate preparation mainly tablet and injection, used in arthritis, eye drops, etc., to improve the elderly degenerative arthritis, rheumatoid arthritis has a certain effect, improve joint problems.