Heart health supplements: what the science says

Experts and major medical organizations report there is not enough evidence that dietary supplements prevent cardiovascular disease, and clinical trials have shown mixed or limited effects for products such as fish oil, CoQ10, psyllium and red yeast rice.

Many people take vitamins or dietary supplements hoping to support heart health. Experts and organizations, including the American Heart Association, say the evidence does not support using supplements to prevent cardiovascular disease. Large clinical trials of common products like over-the-counter fish oil found no clear reduction in major cardiovascular events. Researchers and clinicians note a wide range of study quality and outcomes across different supplements. Key findings: - The American Heart Association concluded there is insufficient evidence to support supplements to prevent cardiovascular disease. - Relying on supplements in place of prescribed heart medications can divert patients from effective, well-studied therapies, experts warned. - Large trials of over-the-counter fish oil did not show lower rates of heart attack or stroke, though a prescription high-purity EPA formulation reduced events in some studies while raising atrial fibrillation risk. - Coenzyme Q10 has only small and limited studies, making firm conclusions difficult. - Psyllium (soluble fiber) showed modest reductions in LDL and related cholesterol measures in reviews, and the FDA permits a qualified claim linking psyllium-containing diets to lower heart disease risk. - Red yeast rice has shown mixed results and can vary in monacolin K content; some supplements have been linked to rare liver injury or contamination concerns. Summary: The reported research shows mixed or limited benefits from many supplements marketed for heart health, and some products carry risks or inconsistent composition. Undetermined at this time.