If healthy people in the U.S. regularly eat more foods rich in omega-3s like EPA and DHA—think fatty fish—their bodies tend to show lower levels of markers linked to chronic inflammation.

If you're a healthy American adult eating a lot of certain vegetable oil fats (n-6), getting more fish oil fats (EPA and DHA) seems to help reduce signs of inflammation in your body. But if you're not eating much of those vegetable oil fats, the fish oil doesn't make much difference.

Omega-3 fats from fish, called EPA and DHA, may help calm down harmful inflammation in your heart and blood vessels by blocking some of the body’s alarm signals, which could lower your risk of heart disease and heart failure.

Eating certain types of healthy fats—like those found in nuts and seeds—doesn’t seem to change levels of inflammation in the blood of healthy American adults.

Eating more fish oil fats called EPA and DHA may help lower inflammation in your body and brain.