Fish oil is a dietary source of omega-3 fatty acids. The body needs omega-3 fatty acids for many functions, from muscle activity to cell growth. Omega-3 fatty acids are derived from food. They cannot be manufactured in the body.
Omega-3 fish oil contains both docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA). Omega-3 fatty acids are essential nutrients that are important for preventing and controlling heart disease. Fish oil is one of the most commonly consumed dietary supplements. Fish oils come from fatty or fatty fish, such as trout, mackerel, tuna, herring, sardines and salmon.
They contain omega-3 fatty acids and many contain vitamins A and D.