Fish and fish oil:  good for most folks, but not all.  Whether you benefit from taking fish oil depends on the state of your heart.
D035843:Biomedical Research; D003324:Coronary Artery Disease; D005395:Fish Oils / Q000627:therapeutic use*; D006331:Heart Diseases / Q000503:physiopathology*; D006801:Humans
D005395:Fish Oils