The content of DHA in colostrum is particularly rich. However, the DHA content in breast milk depends on the food structure of three meals. Japanese mothers eat more fish, and the DHA content in milk is as high as 22%, ranking first in the world; Followed by Australia, about10%; The United States is the lowest, only 7%. 1. formula milk powder. Refers to formula milk powder with DHA added. The so-called DHA content of milk powder is very low. 3. fish. Fish with high DHA content include tuna, bonito, salmon, mackerel, sardines, bamboo pod fish, swordfish, tuna, yellow croaker, saury, eel, hairtail, crucian carp and so on. The DHA content in each 100 g fish can reach more than 1000 mg. As far as a certain kind of fish is concerned, the part with high DHA content promotes orbital fat first, followed by fish oil. 4. dried fruit. Such as walnuts, almonds, peanuts, sesame seeds, etc. The α -linolenic acid contained in it can be converted into DHA in human body. 5. seaweed. 6. DHA products. There are two kinds on the market: one is extracted from deep-sea fish oil and the other is extracted from algae. The former is derived from fish fat, but it has at least three defects: (1) the content of EPA in fish oil is too high, which makes the proportion of DHA too low, which is quite different from breast milk and does not meet the physiological needs of children; ⑵ Although the DHA content in fish oil is relatively high, it does not contain another unsaturated fatty acid AA (arachidonic acid) which plays an important role in brain development, and too much EPA will also inhibit the production of AA in children; ⑶ Fish are polluted to varying degrees by heavy metals such as mercury and lead or harmful substances such as arsenic, so the safety is low. In contrast, the advantages of algae are more prominent. DHA algae oil is a pure plant DHA raw material, extracted from cultured marine microalgae, and is the purest and safest DHA source in the world at present.