Generally speaking, babies do not need to take extra DHA supplements. babies under 6 months of age have a certain demand for DHA, and breast milk and formula milk have sufficient DHA, so there is no need to take extra supplements, while there is no recommended value for babies’ demand for DHA after 6 months of age, so there is no such thing as how old is the best time to start taking DHA. DHA is docosahexaenoic acid, which is a polyunsaturated fatty acid essential to the human body, helping to promote brain and nerve development as well as maintaining the function of visual cells. Before 6 months of age, babies can supplement DHA through breast milk or formula, and the DHA in breast milk or formula can meet the demand of babies’ growth and development, so there is no need to supplement DHA, while there is no recommended value for DHA intake after 6 months of age. Therefore, there is no need for additional DHA supplementation. Therefore, there is no such thing as the best age for babies to start taking DHA.