Although osteoporosis is not unique to the elderly, it is inextricably linked to age. Age determines the nature and cause of osteoporosis to a large extent. By analyzing the age of onset of osteoporosis, we can roughly determine the cause and nature of osteoporosis. In infants and young children, osteoporosis is generally caused by rickets or due to genetic factors; in young and middle-aged people, osteoporosis is considered to be caused by various diseases, especially metabolic and endocrine diseases; such as diabetes, hyperthyroidism, kidney disease, chondromalacia, etc.; in elderly people, osteoporosis occurs most commonly because of the decrease in the level of sex hormones in the body, and with the decrease in age osteoporosis has an aggravating tendency. In addition, osteoporosis is related to a variety of factors such as living habits and exercise. The dietary structure and living habits of young people, middle-aged people and elderly people are different, and the difference in exercise patterns and exercise amounts is also great, so age is closely related to osteoporosis. When osteoporosis occurs, it is important to carefully find the cause so that the treatment can be targeted. Some people think that osteoporosis will occur when people get old, which is actually a misunderstanding. It is not an inevitable product of old age, and if comprehensive prevention can be achieved, not everyone will develop osteoporosis. Young people also need to prevent osteoporosis osteoporosis is a degenerative chronic disease. This disease is difficult to cure and seriously affects the quality of life of people. Young people are in a period of growth and development, so they should seize this favorable opportunity to carry out active prevention to effectively prevent the occurrence of osteochondrosis. The main measures taken for prevention are the following: 1. Ensure the necessary nutritional elements to obtain a high peak bone mass and maintain the stability of bone mass. To this end, young people before and during the development of the body, the diet should be reasonably arranged to consume more food containing calcium, phosphorus and other essential substances for bone metabolism, in order to replenish the raw materials necessary for bone metabolism and make more reserves for the future. 2.Actively exercise and increase the body’s activity appropriately to promote the blood circulation of bone tissue for the growth and development of bone tissue. Exercise to consciously strengthen the exercise of the bones, that is, through a variety of exercises to make the bones stressed, to increase the benign “stimulation” of the bones, which is conducive to the development of bone trabeculae and the increase in bone mass. 3, maintain good habits, quit smoking and alcohol and other bad habits. Smoking and drinking can seriously affect the function of the internal organs, so that the digestive system to reduce the absorption of calcium and phosphorus, while the excretion from the urine and stool increased, so that the internal bone metabolism is in a state of short supply, seriously affecting the normal development of bone picks. 4, do not consume too much protein and caffeine. Because too much intake of protein will produce more acidic substances and excretion from the urine. This will cause a large amount of calcium from the urine, which is not conducive to the prevention of osteoporosis, some people call this phenomenon acid rain in biology. Excessive caffeine intake will cause gastrointestinal function to decline, prompting calcium to be excreted from urine and stool, which is detrimental to bone mass.