The larger the amount of calcium supplemented at one time, the lower the absorption rate, and it is more effective to take calcium supplements in daily installments. A large number of clinical experiments have proved that the absorption of calcium is not directly related to the form of calcium. Different products, under the same conditions, the absorption rate of calcium is basically the same, in strict animal experiments can reach more than 90%, but the actual absorption rate of calcium in humans ranges from 30% to 60%. The main reasons affecting calcium absorption include: young people during rapid growth and development have a high need for calcium, and their absorption rate is higher than that of the elderly; different calcium supplements contain different dosages of calcium, and the larger the amount of supplement, the lower the absorption rate of calcium, and generally the amount of calcium should not be taken at one time should not be more than 500mg, and it is recommended that when choosing calcium supplements, we should read the instructions carefully. In order to improve calcium absorption, it is best to take smaller doses of calcium several times a day. Taking a large amount of calcium at one time will reduce the effective absorption of calcium; various components in the diet, such as oxalic acid in spinach, ellagic acid in persimmons, and phytic acid components in coarse grains, will affect calcium absorption; phosphorus-containing cola beverages, alcohol, and wheat bran, which is rich in phytic acid and ellagic acid, will reduce the absorption of calcium; the right amount of vitamin D, the right amount of The right amount of vitamin D, the right amount of protein can help calcium absorption, while too much vitamin D and protein will reduce calcium absorption, etc., all of which should be taken seriously.