Once upon a time, the lack of “calcium” in children has become the top priority of every family, it should be said that it is a household name, two mothers met to say a sentence “you give the child calcium” has become a buzzword, if you do not give the child supplement “calcium”, it is “OUT”, it is wrong to the child, is not a qualified parent, etc. If you don’t give your child “calcium”, you’re “out”, you can’t live with your child, you’re not a qualified parent, etc. All kinds of manufacturers are using some inflammatory advertising words, the introduction of “calcium” products are endless, so parents are dazzled. What’s wrong with Chinese babies? They are “being” given calcium supplements en masse. Professor Li Keji, a doctoral supervisor at the School of Public Health of Peking University and deputy director of the Special Nutrition Committee of the China Nutrition Association, once surveyed 215 parents of children under the age of 5 about calcium supplementation through a questionnaire, and the results were surprising. “The results were surprising: 199 out of 215 parents were giving their children calcium supplements, 146 of them started to take calcium supplements before 4 months old and 186 at 6 months old. The Ministry of Health issued the “Maternal and Child Health Literacy – Basic Knowledge and Skills (Trial)”, which clearly states that normal full-term newborns generally do not need calcium supplements for six months after birth. Calcium is the most abundant element in the body, with about 1,200 grams, and is one of the most deficient elements. Ninety-nine percent of it forms bones and 1 percent is found in the blood and soft tissues such as muscles. As we all know, parents are keen to give their children calcium supplements, mainly to prevent rickets in infants and children. Rickets is commonly referred to as “calcium deficiency” because of its slow growth and poor bone calcification. In fact, the full name of rickets is “nutritional vitamin D deficiency rickets”, is one of the common chronic nutritional deficiencies of children under 3 years old in China, the incidence of about 20-30%, some areas can be as high as 60% or more? The nature of rickets is due to vitamin D deficiency or lack of vitamin D in the child’s body, resulting in impaired calcium absorption? The dysregulation of calcium and phosphorus metabolism is caused? Vitamin D must be synthesized in the human skin by ultraviolet radiation in sunlight. Daily food contains very little vitamin D. Without the participation of vitamin D, oral calcium supplements are not well absorbed? Infants and children grow fast? The outdoor activity is low, and vitamin D deficiency is easy to occur, and tall buildings in big cities can block sunlight, and atmospheric pollution such as smog? The dust will also absorb some of the ultraviolet rays, so the disease is mostly seen in infants and children under 2 years old, especially those born in autumn and winter, and calcium supplements alone will not treat the disease fundamentally, that is, rickets is a lack of “vitamin D”, not a lack of “calcium”? It is recommended that parents should not be crazy about giving their children calcium supplements: do not follow the advertisements, do not listen to the exaggerated propaganda of certain calcium products, do not follow the clouds and hearsay, but try to improve the dietary structure to achieve the purpose of obtaining adequate amounts of calcium from natural foods. Calcium supplementation for children should be based on dietary supplements, daily food, calcium containing more milk, cheese, eggs, soy products, seaweed, nori, shrimp, sesame, hawthorn, sea fish, vegetables, etc., especially milk, every 100 ml of fresh milk contains 120 mg of calcium, if each person drinks 250 ml of milk per day, it can provide 300 mg of calcium; 500 ml of milk per day, it can supply 600 mg of calcium; and then If you drink 500 ml of milk per day, you can supply 600 mg of calcium.