Judging from the composition of bones, human bones are composed of bone cells, bone minerals and organic matter. Bone cells include osteoblasts, osteoblasts and osteoclasts; Organic matter mainly includes collagen, proteoglycan and bone growth factor, which determine the elasticity of bone; Inorganic substances mainly include calcium, phosphorus, magnesium, potassium, sodium, zinc, manganese and copper. These mineral elements determine the hardness and rigidity of bones, and calcium is actually only the main component of inorganic substances in bones. Bone collagen is fibrous and highly compressible, and the holes and holes between each collagen fiber and each collagen molecule are the storage places of calcium and phosphorus crystals. When bone is lost, both organic matrix and calcium are lost. If only calcium is supplemented without organic matrix, there will be no place for calcium after the loss of organic matrix. Therefore, it is impossible to have a good effect by unilaterally emphasizing calcium supplementation. There is a theory in Chinese medicine, which says that "the marrow is full and healthy, the disease is relieved when it is slow, the blood is exhausted when the marrow is empty, and the brain is empty", which is exactly the same as the folk saying that "the heart is empty when the tree is old, and the marrow is empty when the person is old", which is enough to explain the importance of replenishing the marrow. Sun Simiao, the drug king, once said that "bone marrow can replenish essence, strengthen bones and muscles and prolong life". Three marrow is the nerve center, bone-nourishing center, hematopoietic center and immune center of human body, and it is the life center of human beings. The three marrow decide everything in life, and the filling of the three marrow is the foundation of health. It can be seen that the correct viewpoint of bone nourishing advocated by Jin Nuo Sanmu Pulp is very scientific.