During the consultation, we often hear elderly patients complain: Why do I still lack calcium even though I take calcium supplements every day? According to the epidemiological survey results, the incidence of osteoporosis in people over 60 years old is as high as 56%; the mortality rate after hip fracture is as high as 20% if osteoporosis is present. In recent years, our people’s awareness of calcium supplementation has generally increased on the premise that even some middle-aged and elderly people have taken calcium supplementation as a compulsory daily course to pay attention to, but many people have not achieved the desired effect. The main reasons for this are as follows: 1. The daily dose of calcium supplementation is not up to standard: according to nutritionist statistics, the daily calcium content of the Chinese diet is about 400mg, and the average calcium intake of the urban population is 490mg per day, while normal adults need 8.4mg of calcium per kg of body weight per day, and children need 40-60mg of calcium per kg of body weight per day during the growth period. Thus, it can be seen that the national population still needs a higher dose of calcium supplements, especially for pregnant and elderly women. Currently commercially available calcium supplements often contain very low levels, and even the actual levels do not match the labeled levels. Patients are advised to buy calcium supplements with the National Pharmaceutical Standard number, which has an accurate content, so that it is easy to calculate and supplement according to the amount. 2, the choice of calcium supplements is not appropriate: some calcium supplements are not dissolved and absorbed in body fluids, but instead accumulate and precipitate in the organs, causing kidney and urinary tract stones or damage. The National Non-prescription Drug Catalogue contains calcium carbonate (calcium content 40%), calcium lactate (calcium content 21%), calcium gluconate (calcium content 9%) and calcium citrate (calcium content 21%). Among them, the absorption rate of calcium lactate is above 30%; the absorption rate of calcium gluconate is 27%, but the solubility is good; the absorption rate of calcium lactate is 30%, the absorption rate is good but slow; the calcium citrate is 21%, the solubility is good. 3, because food or drugs affect the absorption of calcium: calcium and corticosteroids, isoniazid, tetracycline or aluminum-containing acid-making drugs together will reduce the absorption of calcium; when combined with iron supplements can reduce the absorption of iron. Food such as vegetables and fruits contain too much oxalic acid and phosphate, which can be used with the formation of insoluble calcium salts, fat can be used with calcium to form second-order calcium soap, thus affecting the absorption of that. 4, the elderly calcium absorption is reduced: the elderly reduce the amount of food, coupled with the elderly tooth loss is not conducive to chewing, food choices are limited, as well as the intestinal absorption function decline and other factors lead to insufficient absorption of calcium. For most elderly people, the decline in organ function, especially reduced kidney function, largely affects the synthesis of active vitamin D3, causing calcium malabsorption. In fact, Chinese medicine has a solution to help with this, which is to strengthen the spleen and stomach to promote calcium digestion and absorption, and to supplement the liver and kidneys to promote calcium utilization and bone reconstruction. With the combination of Chinese and Western medicine, how can calcium supplementation be ineffective?