DHA refers to docosahexaenoic acid, which has the effect of promoting retinal maturation and brain development, and its side effects are not clear. DHA is a polyunsaturated fatty acid essential to the human body, which is found in high levels in fish oils and is mainly supplemented through food.DHA promotes the maturation of the retina, which is its main function. In addition, DHA is also an important component of brain cell membranes, which can participate in the formation and development of brain cells, and therefore has a certain role in promoting the development of the brain. Fatty acids can help maintain the normal function of various tissues in the human body. A deficiency of essential fatty acids may cause growth retardation, abnormal scaly skin, mental retardation and other problems. Therefore, people can supplement the right amount of DHA through food in their lives, and when the body is deficient, they can also take the appropriate preparations under the guidance of a doctor to supplement.