Fish oil is the fat or oil that’s extracted from fish tissue and provides Omega-3 fatty acids in the  form of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA).

It usually comes from oily fish such as herring, tuna, anchovies, and mackerel. 

The American Heart Association (AHA) in its recommendation suggests that these fatty acids benefit the heart of healthy people and those who have cardiovascular disease. They also recommend eating tofu and other forms of soybeans, canola, walnut and flaxseed and their oils.