Generally speaking, children can get enough calcium, iron and zinc from food and do not need additional supplements. However, if your baby is a picky eater, or is deficient in calcium, iron and zinc for other reasons, you need to take targeted supplements under the guidance of your doctor. Calcium, iron and zinc are essential trace elements that contribute to a baby’s intelligence and growth and development. Dairy products, beans and legumes are rich in calcium, lean meat, animal liver, fish and shrimp are rich in iron, while zinc is mainly found in seafood and animal offal, such as: oysters, scallops, fish, animal liver, etc., so you can give your baby more calcium, iron and zinc-rich foods to supplement calcium, iron and zinc. Calcium, iron and zinc are very important to the healthy growth of children, but parents should not give their babies unauthorized supplementation of these trace elements, the need for targeted supplementation under the guidance of a doctor.