Generally, calcium deficiency does not lead to mental retardation, but severe calcium deficiency has a certain impact on the development of intelligence. This is mainly because: 1, calcium will affect the metabolism of nerve cells, is the role of neurotransmitters between neurons; neurotransmitters are the key to the transmission of information between the nerves, which affects the person’s intelligence, mood, mobility, and alertness, which are the embodiment of the intelligence; 2, a severe lack of calcium, but also lead to the occurrence of convulsions, convulsions, the number of convulsions and the duration of the brain damage is related to the brain damage, and perhaps at a later stage may have a child’s Intelligence has a certain impact. Therefore, calcium supplementation is very important for children, parents should pay more attention to the child’s performance of calcium deficiency. If the deficiency is mild, parents are advised to take their children outdoors to get more sunshine and correct the deficiency through dietary supplements. If you find that your child has some bone changes, you should take your child to the hospital for a trace element and vitamin D test, and through the results of the test to guide your child to a reasonable supplement of calcium and vitamin D. It is also recommended that parents take your child outdoors to sunbathe more often, because sunbathing can synthesize vitamin D, which promotes the absorption of calcium in the body.