Fish oil comes from oily fish such as salmon, sardines, tuna, herring and mackerel. It’s rich in a special type of fat called omega-3 polyunsaturated fatty acids (PUFAs), mainly EPA (eicosapentaenoic ...

This article was medically reviewed by Kristen Gradney, M.H.A., R.D.N., L.D.N., a registered dietitian nutritionist and member of the Prevention Medical Review Board, in August 2022. There are so many ...