Supplement
Rosmarinic acid is a plant compound found in rosemary, perilla and other herbs, where it acts as an antioxidant and helps calm inflammatory signaling in the body. People mostly look at it for seasonal allergies, and in a small trial of 29 people, allergy symptoms and nasal congestion both eased, though the evidence is limited. That is only one small study, so it is too early to say how well the results hold up or who they apply to.
Sources: PMID 14988517
- Updated
- How we grade
- 2 studies cited
- Best evidence
- Grade C
- Conditions studied
- 2
- Outcomes
- 3
- Graded outcomes
- 0020
Evidence by condition
- Strong
- Moderate
- Limited
- Very limited
| Grade | Outcome | Effect | Size | Studies | People | Studies list |
|---|---|---|---|---|---|---|
| Nasal Congestion Small Improvement | Improves (the measure goes up) | Small effect | 1 study | 29 people | ||
Studies that measured nasal congestion | ||||||
| Allergy Symptoms Small Improvement | Improves (the measure goes down) | Small effect | 29 people | |||
| Grade | Outcome | Effect | Size | Studies | People | Studies list |
|---|---|---|---|---|---|---|
| Eczema Symptoms | Improves (the measure goes down) | 1 study | 21 people | |||
Studies that measured eczema symptoms | ||||||
Key findings
- Nasal CongestionImproves (the measure goes up)
- Allergy SymptomsImproves (the measure goes down)
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Third-party tested Rosmarinic Acid products. The evidence above is limited, so read it before you buy.
- Grade C
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Studies cited
2 studies from PubMed