Calcium supplementation therapy is also recommended even if there is no calcium deficiency. Calcium is an important cation for the human body to maintain normal physiological functions, and it plays an important role in bone development, maintaining normal bone mass, maintaining the electrophysiological stability of nerves and muscles, and it can also effectively prevent osteoporosis. Survey shows that our national calcium intake in about 450mg, normal adult calcium needs a day for 800mg. pregnancy, lactation, adolescents, children and menopausal women and other special groups, calcium needs for about 1200mg per day. Therefore, the calcium intake from diet alone cannot meet the daily calcium requirement of most people. Most people need to increase their milk intake or take calcium supplementation therapy through oral calcium supplements. So a small amount of calcium supplementation therapy is recommended even if you are not deficient in calcium, especially during pregnancy, breastfeeding, adolescents, children, and menopausal people.