Bone density usually refers to the density of minerals in the human skeleton, which changes with age, increasing gradually from infancy to adulthood and decreasing from middle age to old age. The main purpose of improving bone density is to prevent osteoporosis in middle-aged and old-aged people, so as to avoid the risk of activity limitation or bone fracture, usually through eating certain foods or drugs to improve bone density. Diet: 1, vitamin D: such as animal offal, deep-sea fish and mushrooms and other vitamin D-rich foods, can promote calcium absorption, has a certain effect of improving bone density; 2, vitamin A: eat more vitamin A-rich foods, also has the effect of improving bone density, such as eggs and cream, and at the same time, eat more carrots, carotene in the body can be converted to vitamin A; 3, calcium: such as milk, yogurt and cheese and so on. Calcium: milk, yogurt and cheese and other dairy products, but also includes tofu, dried beans and bean curd skin and other soy products are rich in calcium and other trace elements, as well as proteins, high nutritional value, on the enhancement of bone mineral density has a certain degree of help. Second, drug therapy: in addition to dietary supplements, patients can also choose drugs for treatment. 1, calcium: patients can choose to take calcium gluconate, calcium amino acid chelate calcium and other calcium supplements to supplement calcium, but also with vitamins to take, to promote the absorption of calcium; 2, to promote the absorption of calcium medications: for example, vitamin D, vitamin A, osteoclast triol, etc., can promote calcium absorption, accelerate calcium deposition, thereby Enhance bone density; 3, reduce calcium loss of drugs: such as calcitonin, can reduce bone absorption, reduce blood calcium, increase the calcium content in the bone, commonly used in the treatment of osteoporosis. For patients with low bone density, it is recommended to sunbathe frequently, which helps the intake of vitamin D and also has the effect of calcium supplementation.