Calcium supplements are usually needed during breastfeeding, and you need to consume 1000mg of calcium per day during breastfeeding, either through food or medication. The daily calcium requirement for breastfeeding women and adult women is the same, at 1000mg of calcium per day. According to research, calcium supplementation for breastfeeding mothers does not increase calcium levels in breast milk, and secondly, breastfeeding does not increase bone loss in mothers in the long run, so the calcium requirement for breastfeeding women is the same as that of adult women. However, ensuring a calcium intake of 1000mg per day, if all from food, requires a nursing mother to ensure 500ml of milk per day, as well as yogurt, cheese, soy products, dark vegetables, etc. In addition in order to increase the absorption and utilization of calcium, you can also supplement vitamin D and increase outdoor activities appropriately. If there is no way to ensure adequate food intake, it needs to be supplemented by medication such as calcium carbonate.