Garlic extract / aged garlic extract

Oral garlic supplements / aged garlic extract / garlic extract / garlic powder / allicin-containing tablets-capsules

The strongest current support is for blood pressure, vascular function & arterial stiffness, and blood sugar & insulin markers. Other uses on this page have narrower, weaker, or not-yet-clear evidence.

What the research says

Each row is a different health effect. A means the support looks strongest, B likely helpful, C mixed or modest, and — not enough human evidence yet.

B · Likely helpful

Blood pressure

The research suggests this may help with blood pressure in the studied settings. Broader claims would go beyond the evidence shown here.

7 papers · 2 research reviews

Vascular function & arterial stiffness

The research suggests this may help with vascular function & arterial stiffness in the studied settings. Broader claims would go beyond the evidence shown here.

6 papers · 2 research reviews

Blood sugar & insulin markers

The research suggests this may help with blood sugar & insulin markers in the studied settings. Broader claims would go beyond the evidence shown here.

6 papers · 2 research reviews

C · Mixed or limited evidence

Cholesterol & blood fats

The research on cholesterol & blood fats is mixed, modest, or both. Any claim here should stay narrow and specific.

7 papers · 2 research reviews

— · Not enough human evidence yet

—

Immune function & common cold

Research has been reviewed for immune function & common cold, but the current human evidence is still too limited or inconsistent for a confident benefit claim.

2 papers · 1 research review

—

Liver markers & fatty-liver context

Research has been reviewed for liver markers & fatty-liver context, but the current human evidence is still too limited or inconsistent for a confident benefit claim.

4 papers · 1 research review

Safety

Safety is graded separately from benefits. Read these cautions first, especially if you take medication or have a medical condition.

✓ Safe No clear harm signal in the human evidence reviewed.

✓

Medication, bleeding & surgery cautions

This is a safety note, not a benefit claim. It should not be read as a green light for every person or situation.

4 direct human studies

⚠ Concerning The human evidence points to a meaningful reason for caution.

⚠

Side effects and tolerability

This is a safety note, not a benefit claim. It points to a real reason for caution.

3 direct human studies

Quick facts

A quick read on what this page supports right now.

Health effects reviewed

6 health effects reviewed

Best grade shown

B · Likely helpful

Benefits with support

4 uses currently show some level of supportive evidence

Safety rows

2 separate safety or caution rows

Research volume

21 unique research papers across graded uses on this page

What this means

Keep any benefit claims limited to the specific graded uses shown here.

Quality-verified products

Products that pass third-party quality testing.

Product quality data coming soon

Any future product listings should stay aligned with the specific graded outcomes and the separate safety rows shown here.

How we graded Garlic extract / aged garlic extract

This page shows the current public rows for Garlic extract / aged garlic extract: 21 unique research papers across 6 visible health effects. Safety rows are shown separately from benefit rows when available. The page includes 10 review-level papers and 22 direct human studies. Each supplement is graded by health effect using a certainty × effect matrix applied across PubMed evidence per health effect. Cochrane reviews and high-quality systematic reviews carry the most weight. See Methodology for full detail.

Read the full methodology → · Citation PDF coming soon