Garlic supplements are used for blood pressure and cholesterol. Aged garlic extract is the most studied form.
Calculator Official intake Study doses Best form Safety Sources
This is not an essential nutrient, so there is no official daily intake. Only study doses are shown.
These are doses tested in research, not personal advice. Some exceed the upper limit because they were short courses or given under medical care.
1,200 mg a day
A meta-analysis of 20 trials (970 people) found systolic pressure about 5 mmHg lower, and about 9 mmHg lower in people with high blood pressure. A newer meta-analysis of aged garlic extract found clear effects only above 1,200 mg a day.
Practical pick
Garlic extract as on the label (mg)
Why: Aged garlic extract has the clearest blood pressure data, at 1,200 mg a day or more.
Fresh garlic cloves.
May add to blood thinners and antiplatelet drugs; stop before surgery if your surgeon advises it.
Garlic breath and stomach upset are common.
Pregnant, breastfeeding, on medication, or managing a health condition? Check with a doctor or pharmacist before starting a supplement.
Values checked: November 12, 2026.