Cod liver oil is suitable for babies from two to three weeks after birth to two to three years old. Generally speaking, for breastfed babies, the vitamin A in breast milk can meet the baby’s needs, but the content of vitamin D in breast milk is relatively small, so in order to avoid the baby’s growth and development being affected by the lack of vitamin A and vitamin D, the baby needs to be supplemented with cod liver oil appropriately. Generally babies can start to supplement after half a month after birth, until two to three years old. Cod liver oil is rich in vitamin A and vitamin D, initially eat a drop a day, if the stool is normal, a week later can be increased to two drops a day, with the age of the gradually increase the amount of food, until a capsule a day, as long as the baby does not have diarrhea, eat to the age of two to three years can be.