The best time of the day to take calcium supplements is half an hour after meals and before going to bed. Healthy people can take calcium supplements through dietary supplements, such as milk and soy products, which are rich in calcium. Patients with osteoporosis or even hypocalcemia also need to take calcium supplements, such as calcium carbonate and calcium gluconate. Calcium is usually absorbed most efficiently when taken half an hour after a meal or before bedtime. Calcium gluconate or calcium lactate has a better taste and is suitable for young children. Taking calcium tablets and vitamin D at the same time is beneficial for calcium absorption. However, the absorption of calcium is limited in a day, so taking too many calcium tablets at one time will not achieve the purpose of effective calcium supplementation, and it is necessary to follow medical advice to take the right amount. In addition, participating in physical exercise can also prevent osteoporosis. Receiving ultraviolet radiation during outdoor exercise is beneficial to the synthesis of endogenous vitamin D, which can promote calcium absorption.