Millions Take These Dietary Supplements — but They May Raise Heart Risk
Explore the heart health warnings for fish oil supplements and the importance of informed, medically guided usage.
The Concern Is About Fish Oil Supplements
The Study Found a Higher Risk in Healthy Adults
Atrial Fibrillation Is the Key Warning Sign
The Results Were Different for Heart Patients
Supplements Are Not a Replacement for Diet
Over-the-Counter Use Is the Grey Area
Dose and Product Quality Can Vary
People With Risk Factors Should Be More Careful
The Evidence Does Not Prove Direct Harm
The Smart Move Is to Ask Before Taking It
-
1 / 10
Fish oil supplements are often taken with the belief that they are a simple shortcut to better heart health. They are sold as a convenient source of omega-3 fatty acids, and many people use them because they have heard that eating oily fish is good for the heart.
But the warning is more complicated than the label suggests. A large BMJ Medicine study using UK Biobank data found that regular fish oil supplement use was associated with a higher risk of atrial fibrillation and stroke among people without known cardiovascular disease, while the pattern looked different among people who already had heart disease. The study was observational, so it shows an association, not proof of cause.