DHA can be supplemented in moderation for a few babies born prematurely, and is not necessary for most babies born at full term. DHA is an important unsaturated fatty acid for the human body, which can promote the development of brain cells and retina. Preterm babies can take a moderate amount of DHA supplement after birth due to insufficient innate storage in the body, so as to promote the healthy growth of babies. For babies born at full term, as the DHA content in foods such as milk or fish can meet the needs of the baby’s growth and development, as long as the baby has a normal appetite and has no obvious habits of picky eating and favoritism, there is no need for additional supplementation of DHA. DHA belongs to the nutritional health care products, before giving the baby supplement, need to take the baby to the hospital children’s health department consultation, under the guidance of the physician standardized and reasonable supplementation of DHA, so as to avoid the occurrence of adverse reactions due to oversupplementation.