If you take too much calcium, you will suffer from kidney stones because excessive calcium cannot be absorbed by the body and is excreted from the urine after metabolism by the kidneys. The calcium content in the urine will increase, and over time the calcium will combine with oxalic acid and phosphoric acid to form stones. Therefore, patients suffering from kidney stones should not take excessive calcium supplements. Usually, there is no calcium deficiency in daily life, and there is no need for calcium supplementation treatment to prevent the appearance of urinary stones. The body can cause elevated blood calcium in disease conditions, for example, hyperparathyroidism can cause elevated calcium and increased calcium in the urine, which can form multiple stones, so calcium supplementation therapy is not necessary in non-essential cases. If the body has a disease, although not supplemented with calcium, it can cause an increase in calcium levels in the body, which can also predispose to kidney stones. When kidney stones are present, a 24-hour urine calcium test and a blood calcium test are required to determine whether there is a cause of kidney stones due to excessive calcium supplementation.