We get omega-3 fatty acids – also known as fish oil – straight from the tissues of fish, especially the oily and fatty kind, like salmon. Fish oils contain two types of omega-3s, EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid). Both are great for your body and health – but for slightly different reasons.
It's not just fish either. You can get omega-3s from a few other foods too, like spinach and walnuts. But most people find it nearly impossible to consume enough of this crucial nutrient within their daily diet. Even if you did eat enough seafood, that can carry problems of its own – like the risk of mercury poisoning.