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.
Back in 2002, the American Heart Association recommended that people with coronary artery disease take fish oil. Its reasoning was sound. At the time, solid research showed that eating fish or, for some people, taking fish oil, helped protect against dying of heart disease.
Since then, research has generally supported the benefits of eating more fish or taking fish oil. At the same time, studies have raised a red flag about whether people with severe angina, seriously compromised heart function, or potentially lethal rhythms in the heart's lower chambers should eat a lot of fish or take fish oil.