Calcium supplementation for three months needs to stop because although calcium is an essential nutrient for a healthy body, but usually after three months of calcium supplementation has met the amount of calcium required by the body, if long-term supplementation will affect the body’s ability to regulate calcium and increase the risk of hypercalcemia, stone disease and other diseases. 1, affect the ability to regulate calcium: the human body has the ability to self-regulate calcium balance, when the blood calcium ion concentration increases, calcitonin will store the excess production of calcium ions in the bone. Calcitonin will store the excess production of calcium ions in the bone, when the blood calcium ions are reduced, calcitonin will release the excess calcium ions, if long-term calcium supplementation will break this balance; 2, hypercalcemia: hypercalcemia refers to the abnormal increase in the concentration of calcium in serum ions, when the amount of calcium supplementation is too much, it will affect the combination of serum calcium and protein, causing excessive calcium diffusion from the bone into the intracellular fluid, when the blood calcium increases When the blood calcium increases above 4 mmol/L, hypercalcemia can occur, mainly manifested as polydipsia, polyuria, severe dehydration and circulatory failure. If not rescued in time, can be life-threatening; 3, stone disease: excessive calcium supplementation will also increase the risk of stones, when excessive calcium can not be absorbed by the body, it may be deposited in the kidneys and ureter, as well as the gallbladder, bladder and other parts of the deposition time will be fused oxalic acid and phosphate and then form stones; 4, other: the body’s nutrient content is in a stable, balanced state, high calcium supplementation will to a certain extent inhibit the iron, zinc and other nutrients. To a certain extent, the absorption of iron and zinc will be inhibited, which may cause iron deficiency anemia and insufficient intake of zinc elements. In case of calcium deficiency, people usually choose to use some calcium supplements to supplement, but long time oversupply will cause some harm to the human body, it is more recommended to get natural calcium from food, can consume some seafood, soy products, etc. In addition, appropriate outdoor activities, more sunshine is also a safer and more reliable way to get calcium.