Whether infants need to supplement DHA needs to vary from person to person, full-term babies born without abnormal performance is generally do not need to supplement, premature babies if the body contains less, can be appropriate to supplement. DHA, also known as docosahexaenoic acid, is an essential amino acid and plays an important role in the development of intelligence and vision in infants. Full-term babies can eat normally after birth, whether breastfeeding or milk powder, without other abnormal manifestations, and generally do not need to supplement DHA; premature babies can be supplemented appropriately if their own content is low. Supplementation of DHA should be carried out under the guidance of a doctor, daily attention to the infant’s feeding methods, pay attention to warmth, avoiding cold.