If adults consume too much calcium tablets, it may trigger hypercalcemia, disrupt the acid-base balance in the body, affect blood pressure and heart function, as well as increase the risk of vascular sclerosis as well as atherosclerosis, leading to cardiovascular and cerebrovascular diseases. Higher calcium intake may also affect the absorption of the gastrointestinal tract, leading to symptoms of anorexia, nausea, constipation and indigestion. In addition, it may also lead to urinary stones, trigger hypercalciuria, and even induce blood in the urine. Excessive calcium intake can also affect the intestinal absorption of iron and zinc, leading to iron and zinc trace element deficiency, resulting in anemia, weakness, and lower immunity. Children who consume more calcium, in addition to the above risks, may also lead to early epiphyseal closure, which affects growth and development, early closure of fontanelle, leading to small cranial deformities, as well as leading to increased brittleness of the bone and easy fracture.