Babies usually start taking DHA at 6 months of age and continue to ingest it until they are about two years old. Before six months of age, breastfeeding can satisfy the need for DHA, and the amount of DHA in breast milk can usually meet the needs of the baby’s growth and development. However, with the increase in age, babies will experience accelerated growth and development after six months, and can be supplemented with DHA. the main effect is to promote the development of the brain and optic nerve. Generally speaking, DHA can be consumed until the age of two, especially after six months when babies are fed with complementary foods, which contain DHA, such as marine fish, deep-sea fish oil, dried fruits, and can be supplemented with DHA through food. DHA also belongs to the medication, need to follow the doctor’s advice reasonable application.