Garlic is a pungent bulb whose active compound allicin gives it broad antimicrobial and cardiovascular effects. Meta-analyses show garlic supplements modestly lower blood pressure and cholesterol; evidence for preventing colds is limited. Don't apply raw garlic to skin (burn risk), and use caution with blood thinners.
Ingredient Data
| Catalog No. | 002 |
|---|---|
| Type | Food |
| Source | Bulb of Allium sativum (onion family) |
| Common forms | Raw, cooked, aged extract, oil/capsules |
| Key compounds | Allicin (from crushed cloves), other organosulfur compounds |
| Best for | Blood pressure, cholesterol, general immune support |
Remedy Stats
Subjective ratings use a transparent rubric; Evidence is a hard, sourced fact. How we score →
Works For
| Use | Strength | What the evidence says |
|---|---|---|
| High blood pressure (adjunct) | ●●●●○ | Meta-analyses: systolic ↓ ~5–9 mmHg in hypertensives |
| High cholesterol | ●●●○○ | Modest improvements in total & LDL cholesterol |
| Antibacterial / antifungal | ●●●○○ | Allicin: broad-spectrum, but mostly in-vitro |
| Common cold (prevention) | ●●○○○ | Cochrane: insufficient evidence (one trial) |
Forms & Preparations
| Raw, crushed | Crush and rest ~10 min to form allicin, then eat (don't apply to skin) |
|---|---|
| In cooking | Adds flavor, but heat >80°C destroys most allicin |
| Aged garlic extract | Odorless supplement used in most blood-pressure studies |
| Garlic oil / capsules | Convenient dosed forms; potency varies by product |
About Garlic
Garlic has been used as both food and folk medicine for thousands of years. Its signature compound, allicin, forms only when raw cloves are crushed or chopped, and it breaks down quickly with heat, which is why raw or aged preparations are used when the goal is a health effect rather than flavor.
The strongest modern evidence is cardiovascular: pooled analyses of randomized trials show garlic supplements can modestly lower blood pressure (especially in people with hypertension) and improve cholesterol. For colds, a Cochrane review found only one qualifying trial, so the evidence is limited. In the lab, allicin is a broad-spectrum antimicrobial, but that hasn't been firmly established in everyday use.
Remedies Using Garlic
| Remedy | Pairs with | Frequency |
|---|---|---|
| Heart-Healthy Garlic | Aged extract, diet | Daily |
| Cold-Season Garlic Honey | Honey | 10 min |
| Immune Support | Balanced diet | Daily |
Sources
- Lissiman E, et al. Garlic for the common cold. Cochrane Database of Systematic Reviews, 2014.
- Ried K, et al. Meta-analyses on garlic, blood pressure & cholesterol, The Journal of Nutrition and related reviews.
- Ankri S, Mirelman D. Antimicrobial properties of allicin from garlic. Microbes and Infection, 1999.
- NCCIH (NIH), Garlic: Usefulness and Safety (bleeding risk, interactions, side effects).
This page is for informational purposes only and is not a substitute for professional medical advice. Always consult a qualified healthcare provider, especially if you take medication or are pregnant.