If you want to supplement calcium, you can eat some foods rich in calcium, such as milk powder, yogurt and pure milk. And you can eat more soy products, such as tofu and soybean milk. Fresh fruits and vegetables, lean meat, eggs and whole grains are also rich in calcium, so you should eat more at ordinary times. In short, don't be picky about food. But if the tonic effect is not good, you can add some calcium citrate to absorb it well. Without preservatives and additives, it tastes better, especially for babies, and is easy to accept.