SUPPLEMENTS · RESEARCH-BASED GUIDE

Before Taking a Supplement: A Safety Checklist

Dietary supplements can contain ingredients with strong effects in the body. “Natural” does not guarantee safe, and products can interact with medicines, other supplements, laboratory tests, or medical procedures.

1. Write down everything you take

List prescription medicines, over-the-counter products, vitamins, minerals, botanicals, caffeine products, and other supplements. Include the amount and frequency. Bring the list—or clear photos of every label—to a doctor or pharmacist.

2. Read the Supplement Facts panel

Check the serving size, servings per container, each dietary ingredient, and the amount per serving. Compare the amount you plan to take with the label directions. Watch for overlapping ingredients across multiple products.

3. Check interactions and personal risks

Ask whether the product could change how a medicine is absorbed, metabolized, or removed from the body. Extra care is needed around surgery, pregnancy or breastfeeding, allergies, and ongoing health conditions. A qualified professional can interpret those risks for your situation.

4. Separate claims from approval

In the United States, the FDA does not approve dietary supplements for safety and effectiveness before they are marketed. Be cautious with claims that a product diagnoses, treats, cures, or prevents ADHD or another disease.

5. Do not replace prescribed care

Do not stop a medicine or substitute a supplement without speaking with the clinician who manages your care. A supplement should not replace a varied diet or delay an assessment when symptoms affect daily life.

6. Respond to unexpected symptoms

If you think a supplement caused a serious reaction, stop using it and seek medical advice. In an emergency, use local emergency services. In the United States, adverse events can also be reported through the FDA’s safety reporting channels.

Sources: FDA 101: Dietary Supplements; FDA: Mixing medications and supplements; FDA dietary supplement questions and answers. Last reviewed September 27, 2026. Educational information only; not medical advice.