Pillow baldness is one of the manifestations of calcium deficiency, but this is not the only criterion to determine whether a baby is calcium deficient. Usually, the diagnosis of calcium deficiency is based on: ① whether the long-term calcium intake or vitamin D intake is insufficient; ② whether there are clinical symptoms, including occipital baldness, sleep disturbance, excessive sweating, square skull or, skeletal deformities, delayed teething and susceptibility to dental caries; ③ the results of hospital physical examination or bone mineral testing. So don’t find the baby has pillow baldness directly judge the baby calcium deficiency, whether calcium deficiency should be more through the above factors comprehensive judgment. The role of vitamin D is to promote calcium absorption. If the calcium deficiency is caused by insufficient calcium intake, supplementing with vitamin D alone is ineffective, and it is like building a house without enough bricks and tiles. The raw material for bone growth is calcium, and calcium absorption and utilization is higher under the effect of vitamin D. Therefore, calcium deficiency should be supplemented with appropriate amount of calcium preparations (calcium supplements with added vitamin D are better) to maintain the balance of all body functions and normal development. Micronutrient testing cannot be used as a clinical basis to determine whether a baby is calcium deficient. Many mothers have taken their babies for trace element testing, and if the test results do not meet the standard, they will provide their babies with calcium supplements, and if the results meet the standard, they can rest easy. In fact, trace elements can only determine whether the calcium level in the blood is at the standard level. Generally speaking, calcium levels in the human body are very stable, and when there is a lack of free calcium, the body will break down the calcium in the bones to replenish and maintain the calcium balance. Breastfeeding mothers have the task of feeding their babies, and their daily calcium intake needs to meet not only their own body needs, but also the needs of their babies. Every 100 ml of breast milk provides 30-34 mg of calcium, and during the first year after delivery, the mother provides about 300 mg of calcium per day to her baby through her breast milk. Therefore, lactating mothers need to supplement their diet with large amounts of calcium to maintain their additional expenses. It is important to note that mothers with calcium deficiency have low calcium content in their milk, which is called “low calcium milk”. 1, 0 ~ 3 years old baby calcium supplementation: this period of the baby earn in the development of taste buds, sweet and sour taste will affect the development of taste buds, resulting in baby does not like to drink, picky anorexia. Therefore, the first bite of calcium for babies should choose light milk flavor. 2, children over 3 years old calcium supplementation: happy calcium supplementation is the common desire of children and parents at this stage. Also we need to choose sugar-free products that will not cause tooth decay and do not increase calories!