Supplement
Cat's claw is a woody vine from the Amazon rainforest, and its bark has long been made into teas and extracts that are thought to influence how immune cells behave. People mostly look at it for immune health, and in the one small study reviewed here, white blood cell counts went up, though the evidence is limited. That study involved only four participants and tested a specific extract, so it can't tell us whether the finding would hold for other people or other products.
Sources: PMID 10687868
- Updated
- How we grade
- 1 study cited
- Best evidence
- Grade C
- Conditions studied
- 2
- Outcomes
- 2
- Graded outcomes
- 0010
Evidence by condition
- Strong
- Moderate
- Limited
- Very limited
| Grade | Outcome | Effect | Size | Studies | People | Studies list |
|---|---|---|---|---|---|---|
| White Blood Cell Count Small Increase | Improves (the measure goes up) | Small effect | 1 study | 4 people | ||
Studies that measured white blood cell count | ||||||
| Grade | Outcome | Effect | Size | Studies | People | Studies list |
|---|---|---|---|---|---|---|
| White Blood Cell Count | Improves (the measure goes up) | 1 study | 4 people | |||
Studies that measured white blood cell count | ||||||
Key findings
- White Blood Cell CountImproves (the measure goes up)
Shop Cat's claw
Third-party tested Cat's claw products. The evidence above is limited, so read it before you buy.
- Grade C
Links to Fullscript, iHerb or Thorne carry our referral, so we may earn a commission at no extra cost to you. Grades come from the research and never change based on what we earn. Fullscript asks for a free account before it shows its catalog and prices. Full disclosure
Studies cited
1 study from PubMed