Add Yahoo as a preferred source to see more of our stories on Google. Fish oil supplements have come under fire recently after research found many brands make claims about heart health that aren't ...

Fish oil contains omega-3s, fats found in certain foods that can benefit the heart. But there's no conclusive evidence that fish oil supplements can lower blood pressure.

Fish oil’s cancer-fighting reputation may hinge on a little-known gene. Researchers discovered that omega-3s like EPA and DHA help curb colorectal cancer only when the enzyme ALOX15 is present.