Milk calcium is an active high milk protein calcium extracted from milk, rich in minerals, protein, lactose, etc. It is easy to digest and absorb and belongs to health care products, which are generally used for infants and young children to supplement calcium supplements. Because of the low calcium content, children aged 12 to 18 are recommended to choose calcium carbonate, calcium lactate and other calcium supplements under the guidance of a doctor. Milk calcium, although a variety of ingredients, absorption and utilization rate is high, and is not easy to cause bloating, constipation and other gastrointestinal reactions, but the milk calcium products on the market, the calcium content of about 25%, a milk calcium capsule calcium content is difficult to more than 100mg, and 12 ~ 18 years old children, the daily calcium needs of about 1,000mg or so, at this time, choose the dose of milk calcium is not enough. Generally speaking, you can choose calcium carbonate and calcium lactate with higher calcium content under the guidance of the doctor, which are relatively inexpensive, and the role of promoting growth is the same.