Hello, you can take vitamin AD agents after the baby's full moon, such as Yikexin and cod liver oil, which is beneficial to calcium absorption in the body. Babies can also take calcium supplements, such as milk calcium and calcium lactate, which is beneficial to baby's tooth growth and bone calcification. For cod liver oil, don't give it to your baby for a long time. Give it to your baby intermittently, each time for 1-2 months, then stop taking it for a few months and then start taking it again.