Garlic Supplements: Benefits, Dosage and Safety
Summary
Garlic supplements may slightly lower blood pressure and cholesterol, but effects are small and inconsistent. Garlic can increase bleeding risk with blood thinners and before surgery.
Evidence at a glance
| Use | Grade | What the research shows |
|---|---|---|
| Blood pressure | C | Small reductions in some studies. |
| Cholesterol | C | Small, inconsistent effects. |
A: strong, consistent human evidence · B: moderate · C: limited or mixed · D: good evidence of no benefit.
Garlic has been used as food and medicine for thousands of years.
How to take it
Aged garlic extract is a common form. See blood pressure supplements.
Safety and interactions
Causes breath and body odor, heartburn, and may increase bleeding. Garlic is toxic to dogs.
Always tell your doctor and pharmacist about the supplements you take. Check combinations with our interaction checker.
Sources
This page is for education and is not a substitute for advice from your doctor. Read our medical disclaimer.