Fish oil is the go-to source for two long-chain omega-3 (a.k.a. n-3) polyunsaturated fatty acids: eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Fish oil can be consumed in the diet (from foods like salmon or anchovies), and is also available as a dietary supplement and as a prescription drug. The role of fish oil in cardiovascular disease, cancer, and many other conditions is a field of considerable interest and research.[1]
According to recent analyses of NHANES, over 20% of the population in the United States takes an omega-3-containing dietary supplement.[2]