Research · Systematic review
Garlic for the common cold
What it found
The single eligible trial reported far fewer colds with garlic (24 vs 65) — but Cochrane judged the evidence insufficient, resting on one self-reported, high-risk-of-bias study.
- Design
- Systematic review
- Year
- 2014
- Sample size
- 146
- Population
- adults (only one eligible RCT, 146 participants)
- Intervention
- garlic supplement (180 mg allicin/day) for 12 weeks vs placebo
- Outcome
- number of colds, illness days, recovery time
- Journal
- Cochrane Database of Systematic Reviews
Citation last checked 2026-06-21.