Analysis of illness: in the usual diet, we should eat more foods rich in antioxidants, such as mango and papaya. Once the body cartilage is damaged, you can take some products that can promote cartilage regeneration, such as sawtooth mackerel cartilage powder. Because cartilage is not a calcareous structure, it is a kind of protein fibrous tissue, and its main component is acidic glycosaminoglycan. I wish you the best of health!