Translations:Omega-3 fatty acid/14/en

Chemistry

 
Chemical structure of eicosapentaenoic acid (EPA)
 
Chemical structure of docosahexaenoic acid (DHA)

An omega−3 fatty acid is a fatty acid with multiple double bonds, where the first double bond is between the third and fourth carbon atoms from the end of the carbon atom chain. "Short-chain" omega−3 fatty acids have a chain of 18 carbon atoms or less, while "long-chain" omega−3 fatty acids have a chain of 20 or more.