Generally calcium and zinc cannot be supplemented together because chemically zinc and calcium are both divalent metal ions, and taking them at the same time will also cause antagonism due to competition for the same protein carrier, which will seriously affect the absorption of calcium, while zinc is hardly absorbed. At least two hours between zinc and calcium supplementation, zinc can also be given first to promote the division growth and regeneration of the child’s bone cells, which lays a good foundation for calcium deposition. But this is theoretically speaking, there are also many calcium and zinc supplements combined together in clinical practice, such as calcium and zinc gluconate oral solution, which are combined into one and are supplementable. In the case of calcium and zinc alone, supplementation is not recommended. You can usually supplement zinc first and then calcium, while diversifying your food, not being picky, and having regular checkups. The richest sources of zinc in food are lean pork, lean beef, lean lamb, fish, and oyster meat. Plant foods, on the other hand, are hard-shelled, such as walnuts, which are the richest in zinc, so eat more fish. Seafood, pumpkin, eggplant, cabbage, beans, nuts, contain zinc-rich foods. However, those who are already zinc deficient should take some zinc supplement products, such as zinc and selenium, which are fast and have no side effects.