Fish oil and DHA are different. Fish oil is a substance extracted from marine fish, and DHA refers to polyunsaturated fatty acids, which is the most important nutrient in fish oil. It can be said that fish oil contains DHA, but they are not the same. DHA, commonly known as brain gold, is an important part of the brain and retina, and is an indispensable material basis for the formation, development and operation of brain cells. It can promote the regulation of neural circuits, maintain the normal operation of brain cells, promote the development of cranial nerves, enhance memory, improve vision and relieve asthenopia. It is an important element for the growth and maintenance of cells in the nervous system, and its content is as high as 20% in the cerebral cortex and about 50% in the retina.

Cod liver oil is not DHA, and the difference between cod liver oil and DHA is: 1. The main components of cod liver oil are vitamins D and A; The main components of DHA fish oil are polyunsaturated fatty acids DHA and EPA. 2. cod liver oil contains vitamin d, which is used to prevent rickets. DHA fish oil is used to prevent cardiovascular diseases in adults; DHA seaweed oil is used to prevent pregnant women and infants from lacking DHA and linolenic acid, and to help infants develop their brains. Cod liver oil can promote the absorption of calcium and phosphorus, thus promoting the development of baby's bones and teeth and maintaining the normal metabolism of the body. DHA can optimize the composition of phospholipids in pyramidal cells of fetal brain, and make neurons in sensory center of fetal cerebral cortex grow more dendrites, thus promoting the development of baby's brain.