For those who did not get enough calcium during their teenage years, modern research shows that calcium in the human body reaches a peak before the age of 25-30, after which it decreases with age, so we need to get enough calcium during our teenage years to increase the total amount of “calcium stores”. The lack of exercise, muscle relaxation, bone loss of exercise stimulation, bone metabolism slows down, responsible for bone building osteoblasts and osteoclasts out of balance, osteogenesis decreased, osteoclasts increased, bone strength decreasing. Some studies have shown that the loss of calcium from being bedridden for more than 1 week greatly exceeds that of regular days. People who lack mineral supplementation, that is, people who seldom drink milk or take calcium tablets, it is like cooking rice, not even rice, how to make this rice. People who rarely get sunlight, because proper sun exposure can promote the production of active vitamin D in the body, and vitamin D can promote the absorption of calcium and phosphorus and other minerals in the body. We all know that if children do not get enough sunlight will occur chondromalacia, or rickets, there will be O-shaped legs, X-shaped legs, but also due to the lack of calcium absorption. People with poor digestion and absorption, these people eat well and eat more, absorption is limited, and bone quality is not high. People with certain chronic wasting diseases, such as: diabetes, hyperthyroidism, hyperparathyroidism, chronic kidney disease or renal failure, chronic gastroenteritis, etc., these diseases will accelerate the loss of calcium. People with a thin body type, which is also like a large tree, even the skin is not, how to nutrition. People who use hormones for a long time can also lead to increased calcium loss. Infertile people, women with early amenorrhea (usually women with amenorrhea at about 49 years of age, early amenorrhea or even under 40 years of age, as early amenorrhea), or women with uterine or ovarian disease, resection, disorders of sex hormone metabolism in the body, gastrointestinal absorption of calcium is weakened, which leads to osteoporosis; long-term smoking, alcoholics, tobacco nicotine can stimulate osteoclast activity, inhibit osteoblast The activity of osteoclasts can be inhibited by tobacco, which can lead to reduced bone formation and increased bone loss. Some studies have shown that smoking affects bone strength and increases the risk of fracture, especially in women, such as women who smoke a pack of cigarettes a day from youth to menopause, bone density is 5%-8% lower than the normal population of the same age. A small amount (not more than 100g per day) of alcohol, has a role in promoting blood circulation and reducing the occurrence of cardiovascular disease, but a large amount of alcohol, or even alcohol abuse can lead to liver and kidney damage, affect the activation of vitamin D, affect the absorption of calcium, can lead to damage to the gastrointestinal mucosa, affecting the absorption of calcium and phosphorus and vitamin D; people with a biased diet, such as long-term vegetarians, there is no mineral supplement in the body, how not bone Osteoporosis, long-term consumption of greasy food, will also hinder the absorption of calcium.