When can newborns start taking fish liver oil?

Babies can start taking cod liver oil at 4 months of age. Infants at this age may gradually begin taking a small amount of cod liver oil under the guidance of a pediatrician, with a general recommendation not to exceed 0.5 ml per day. Cod liver oil is rich in vitamins A, D, and E, as well as fatty acids, which greatly benefit a newborn's muscles, bones, immune system, and skin.