Calcium citrate is mainly a calcium supplement. Treatment or prevention of osteoporosis, rickets due to calcium deficiency, and calcium supplementation for children, pregnancy, and the elderly. It is mainly added to foods, beverages, dairy products, candy, etc. A common adverse reaction is that constipation can occasionally occur. For patients with hypercalcemia and calcium-containing kidney stones, consumption is generally not recommended. When there are symptoms of calcium deficiency, it is recommended to go to the hospital to check the trace elements to see the body’s calcium content, if lack of calcium can be properly supplemented; if there is no lack, can be supplemented by diet, you can eat foods with high calcium content, eat more fresh vegetables and fruits, more sunshine, balanced diet and nutrition.