Calcium carbonate is a calcium supplement for calcium deficiency, because it contains not only calcium and vitamin D, but also Ca2+, which can play a role in calcium supplementation. It is mainly used in cases of osteoporosis in the elderly, calcium loss in the bones of menopausal women due to a decrease in estrogen levels, and calcium deficiency in adolescents. This drug is usually taken orally twice a day, 1-2 tablets each time can play a very good effect, before the application of this drug is best to go to the hospital to take blood tests to see if the Ca2+ component of the body is low, and then to carry out targeted treatment to avoid the situation of high Ca2+. In addition, you should also increase your Ca2+ intake from foods such as bone broth, meat, milk, eggs, etc. It is best to dry the bones of fish and then roll them into powder, which can also effectively replenish Ca2+, and increase physical exercise and sunlight to improve the body’s vitamin D, which helps replenish Ca2+.