Calcium supplementation is not based on how many months of the year it is taken, but is determined by the normalization of calcium levels in the body and the presence of adverse reactions. Calcium supplementation is intended for use in the prevention and treatment of calcium deficiencies such as osteoporosis, tetany, osteogenesis imperfecta, rickets, as well as calcium supplementation for children, pregnant and lactating women, menopausal women, and the elderly. Calcium supplementation should be stopped or prohibited if hypercalcemia or hypercalciuria occurs. In the process of calcium supplementation, attention should be paid to whether there are adverse reactions, such as: constipation, kidney stones, ureteral stones, bladder stones, etc. If hypercalcemia and stone disease occur, it is necessary to discontinue or use with caution. Healthy people can take calcium supplements through food. Foods with high calcium content, such as milk, soy products, etc., but also more exercise, more sunshine, to promote the absorption of calcium, if you need to take calcium drugs should be applied under the guidance of a doctor.