Why babies need DHA supplement DHA is an essential fatty acid in the human body and an important nutrient required for the development of the baby\’s brain and retina. Within 6 months after a baby is born, the brain and retina develop very rapidly. Giving enough DHA at this time can help the baby improve his learning ability and exercise memory and attention. In addition, DHA is also very effective in preventing and treating neurological defects in infants and correcting visual impairment. Which brand of DHA supplement should you choose? There are many brands on the market