Fish oil supplements contain omega-3 fatty acids, which are vital for good health. They may help decrease the inflammation associated with diabetes, heart disease, and other conditions (13Trusted Source, 14Trusted Source, 15Trusted Source, 16Trusted Source).
The two primary omega-3s in fish oil are eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Your body converts them to ALA, which is an essential fatty acid (17Trusted Source).
DHA, in particular, has been shown to have anti-inflammatory effects that reduce cytokine levels and promote gut health. It may also decrease the inflammation and muscle damage that occur after exercise, but more research is needed (18Trusted Source, 19Trusted Source, 20Trusted Source, 21Trusted Source, 22Trusted Source, 23Trusted Source).
Some studies show that DHA supplementation can significantly reduce levels of inflammatory markers compared with a placebo (20Trusted Source, 23Trusted Source).
Fish oil dosages containing less than 2 grams combined of EPA and DHA are safe, but fish oil may cause fishy burps, bad breath, heartburn, or gastrointestinal upset (17Trusted Source).
If you have a compromised immune system or you’re taking a blood thinner, talk with a healthcare professional before taking fish oil.