It is better for teenagers to supplement calcium and eat calcium carbonate tablets. Calcium deficiency will affect many problems of human body. Calcium can keep strong bones and healthy teeth, keep regular heart rhythm, relieve insomnia symptoms, help iron metabolism in the body and strengthen people's nervous system. Teenagers will have many symptoms when they are short of calcium, such as irritability, hyperactivity, stunting, slow tooth change, sweating and so on. Therefore, in order to promote growth and development, calcium can be supplemented appropriately. At present, there are calcium gluconate, calcium carbonate and calcium lactate. Calcium carbonate can be taken, and its absorption and utilization rate is relatively high. In addition, pay attention to eating shrimp skin and drinking milk.