What is a dietary supplement?
Supplements include vitamins, minerals, herbs, and products such as fish oil. They may help meet a specific nutritional need. Taking a product labeled “heart health” does not mean it has been shown to prevent a heart attack, stroke, or an abnormal rhythm.
Do not replace your heart medicines with a supplement or change your medicines on your own.
Start with the purpose
Ask what problem you are trying to address: a confirmed low nutrient level, high triglycerides, muscle symptoms, or a general wish to stay healthy. The evidence and risks differ for each purpose. A benefit in one group of people may not apply to you.
Food first, when possible
Food supplies nutrients along with fiber and other useful components. Supplements can be appropriate when food alone cannot meet a nutritional need. Your care team can help you choose an approach that fits your health conditions and eating habits.
What does the label really tell you?
In the United States, supplements are regulated differently from medicines. FDA generally does not approve them for safety and effectiveness before sale. “Supports heart health” is a marketing claim, not proof that a product treats heart disease. “Natural” does not guarantee safety.
Three questions before buying
- What benefit has been shown in people like me?
- Could this interact with my medicines or medical conditions?
- How will we know whether it is helping?
Evidence reviewed October 2026. Educational information; your own care plan may differ.