For a healthy adult, the best way to increase intakes of omega-3 fatty acids is to eat fish.
The best way to get enough omega-3 fatty acids is by eating fatty fish at least twice a week. Omega-3 fatty acids have a carbon double bond located three carbons from the methyl end of the chain and include acids like alpha-linolenic acid (ALA), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA).