Calcium carbonate tablets are best taken half an hour after a meal, while a reasonable amount of vitamin D supplementation may be more effective. Calcium carbonate is a calcium agent, mainly used for the treatment and prevention of calcium deficiency, such as bone dysplasia, calcium deficiency in women during pregnancy, osteoporosis, lactating women and calcium supplementation for the elderly, etc. Now the more common on the market is calcium carbonate D3 tablets, which is originally a compound preparation that can supplement both vitamin D and reasonable calcium supplementation, thus allowing the body to better have calcium absorption. Of course calcium absorption is more need to be carried out under the premise of dietary structure adjustment, it is best to get calcium supplements from the dietary structure, such as calcium is higher in milk, tofu, vegetables, etc., to increase the amount of these diets, so as to better play the role of calcium supplementation and promote calcium absorption. In the premise of dietary structure adjustment, if there is osteoporosis or women during pregnancy or lactation lack of calcium, you can additionally add calcium tablets as a supplement, the effect will be better.