Docosahexaenoic acid, DHA, is an essential polyunsaturated fatty acid in fish oil. The molecular formula is C22H32O2, which is a straight-chain fatty acid with 22 carbon atoms and 6 double bonds. Glycerol phospholipids of animals contain different amounts of DHA, which can be produced by α -linolenic acid during metabolism in vivo, but the production is low, mainly through food supplement.

Foods rich in DHA

1, fish: such as tuna, yellow croaker, eel, crucian carp, etc., among which the DHA content in eye socket fat is the highest, followed by fish oil.

2. Dried fruits: such as peanuts, sesame seeds, walnuts, etc., are rich in α -linolenic acid and can be converted into DHA in the human body.

3, algae: such as seaweed, Undaria pinnatifida, kelp, etc., also rich in DHA.

Because DHA is an unsaturated fatty acid, fruits usually do not contain DHA, and foods containing DHA mainly include fish, dried fruits and algae. For babies, breast milk is also rich in DHA.