Low density of bones means osteoporosis. Osteoporosis is a decrease in the number of bone trabeculae per unit area, and when the number of bone trabeculae decreases, the corresponding bones become lax and less resistant to external forces, resulting in easy fracture. In the case of reduced bone density, the bone cannot grow to make up for the bone density, so osteoporosis should be prevented more than treated. In the early stage, especially for women before and after menopause, regular calcium supplementation, appropriate oral sodium allantoin phosphate, and appropriate oral osteotriol and other drugs that promote bone calcium deposition should be taken. Also exercise properly, try to get more sunlight, avoid eating vegetables that affect bone metabolism, such as spinach, and also avoid taking drugs to prevent osteoporosis from occurring.