Herb Profile

Cat's Claw

Uncaria tomentosa

Cat's Claw (Uncaria tomentosa) carries a Grade C rating — limited evidence.

Last reviewed: 3 sources citedReport a correctionProfile-wide ·C Limited

Use extra caution Avoid in pregnancy, breastfeeding, transplant recipients, and immunosuppressed users; caution with autoimmune disease, anticoagulants/antiplatelets, antihypertensives, and perioperative use. Details

Evidence
Limited Evidence
Typical onset
Varies by prep
Safety rating
High caution
Best for
Anti Inflammatory, Immune, Inflammatory signaling
Avoid / review if
Pregnancy/Breastfeeding Without Clinician Supervision, Known Allergy To The Plant/Family, Potential Interaction Concern With Immunosuppressants
Cat's Claw monograph visual
Generated profile category visual

At a glance

From this profile's structured data
Evidence
Grade C
Safety
Avoid in pregnancy, breastfeeding, transplant recipients, and immunosuppressed users; caution with autoimmune disease, anticoagulants/antiplatelets, antihypertensives, and perioperative use.
Profile context
anti-inflammatory, immune
Next steps

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Safety

Safety & Cautions

Avoid in pregnancy, breastfeeding, transplant recipients, and immunosuppressed users; caution with autoimmune disease, anticoagulants/antiplatelets, antihypertensives, and perioperative use.

High caution

Caution level: High. Multiple caution categories apply, or the record uses avoid/contraindication language.

  • Interaction-AwareMedication or interaction context is explicitly noted.
  • Pregnancy/Breastfeeding CautionPregnancy or breastfeeding caution language is present.
Detailed safety fields

Pregnancy, breastfeeding, and contraindications

  • Pregnancy/Breastfeeding Without Clinician Supervision
  • Known Allergy To The Plant/Family
  • Potential Interaction Concern With Immunosuppressants
  • Use Clinician Review For High Dose Extracts Or Chronic Use.

Safety classifications

  • Interaction-Aware: Medication or interaction context is explicitly noted.
  • Pregnancy/Breastfeeding Caution: Pregnancy or breastfeeding caution language is present.

Full safety note

  • Avoid in pregnancy, breastfeeding, transplant recipients, and immunosuppressed users; caution with autoimmune disease, anticoagulants/antiplatelets, antihypertensives, and perioperative use.

Safety labels

  • Interaction-Aware
  • Pregnancy/Breastfeeding Caution

Evidence

Evidence Summary

Evidence lens

Read as directional context, not settled clinical proof.

LimitedLimited Evidence

Human clinical evidence: Not the primary signal

Mechanistic / preclinical: Mechanism mappedInflammatory Signaling Modulation · Immune Signaling Modulation · NF KB Modulation

Research maturity: Theoretical / mechanistic researchMechanistic or unresolved evidence is kept separate from established human outcomes.

Safety boundary: Safety note availableAvoid in pregnancy, breastfeeding, transplant recipients, and immunosuppressed users; caution with autoimmune disease, anticoagulants/antiplatelets, antihypertensives, and perioperative use.

This profile cites 3 human studies.

Study design details
Evidence Grade

Grade C: Limited Evidence

Evaluation of methodological rigor, population reach, and evidence alignment.

Design Match
Narrative review
Risk of Bias
High
Consistency
Not assessed
Strongest recorded design is a narrative review, drawn from 3 recorded studies, none of which measured an outcome in people.
How evidence grades work

Each grade reflects the strength and consistency of published human evidence — not marketing claims. Grades are based on study count, design quality, effect size, consistency, and recency.

Strong
Multiple RCTs, consistent direction, adequate effect size
Moderate
Some RCTs or consistent observational data in humans
Preliminary / Mixed
Animal or in-vitro only, or conflicting human data
Traditional / Theoretical
Traditional use only; no controlled human trials
Clinical Study Summaries (3)0 human evidence sources · 0 human trials · Participant totals not consistently reported · Consistency not yet classifiable

What the evidence actually shows

This table contains 3 structured sources, including 0 human evidence sources; 0 are human trials.

StudyDesignNDoseDurationPopulationOutcomeResult & magnitudeSource

Neuroprotective Herbs for the Management of Alzheimer's Disease

Gregory J et al. · Biomolecules · 2021

Background
Narrative review

Summarizes selected literature without the full prespecified search and selection methods of a systematic review.

PubMed

Cat's Claw

PubMed indexed authors · 2012

Background
Narrative review

Summarizes selected literature without the full prespecified search and selection methods of a systematic review.

PubMed

Cat's claw: an Amazonian vine decreases inflammation in osteoarthritis

Hardin SR et al. · Complement Ther Clin Pract · 2007

Background
Narrative review

Summarizes selected literature without the full prespecified search and selection methods of a systematic review.

PubMed

Dosing & Timing

No standardized dose
Preparation specific; use standardized product label for Preparation varies by tradition and product form and require source backed dosage review before therapeutic claims.
How Cat's Claw works

Simplified mechanism pathway based on preclinical and pharmacological evidence. Does not confirm clinical efficacy.

Mechanism Pathway — How Cat's Claw Works

How Cat's Claw WorksCat's Claw acts on biological target pathways via anti inflammatory, leading to anti inflammatory.Cat's ClawBiological TargetBiological pathwayAnti InflammatoryAnti InflammatoryObservable outcomeImmune ModulationParallel pathway
CompoundTarget / ReceptorMechanismEffect / Outcome
Mechanisms & biological pathways (preclinical)
  • Inflammatory Signaling Modulation
  • Immune Signaling Modulation
  • NF KB Modulation

Compare related active botanicals

Explore botanicals with similar chemistry, effects, or safety considerations in the Botanical Activity Atlas.

Compare & Sourcing

Compare side-by-side tradeoffs or verify active marker guidelines.

Sourcing options

Cat's Claw product picks

Recommendation status

Product recommendations are not shown for this profile because the current site safety and monetization policy does not permit them.

Product form & quality guidelines

When sourcing Cat's Claw, verify the label for:

  • Standardized extract: Confirm active content percentages on the supplement facts panel (e.g. standardized to specific marker compounds) rather than simple raw herb weights.
  • Third-party testing: Look for independent purity labels (USP, NSF, ConsumerLab, or Eurofins) to ensure the product is free from heavy metals, solvents, and contaminants.
  • Form bioavailability: Ensure the form matches evidence-supported configurations (e.g. standardized active extracts like bacosides, withanolides, or curcuminoids) for optimal onset and digestion tolerance.

Safety first · Harm reduction

This information is educational and not medical advice. Start low, avoid risky combinations, and consult a licensed clinician before making health decisions—especially if you use medications, have diagnosed conditions, or are pregnant/breastfeeding.

Learn how we evaluate confidence, safety, and intensity on the methodology page.

Editorial Review

Checked against primary sources, cited evidence, and contraindication language before publication. Evidence claims, safety language, and affiliate modules are reviewed independently. Not personal medical advice.

Editorial Standards →

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