Cat's Claw for Health & Longevity - Quick Reference Sheet
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Cat's Claw for Health & Longevity

Created on 07/20/2026 – Quick Reference based on Evidence Review created using AI4L / Opus 4.8 – Audit

Cat's Claw is an Amazonian vine long used for immune support and calming inflammation. Its clearest effect — lowering inflammation and neutralizing free radicals — is shown mainly in the lab. Small studies hint at relief in arthritis, better vaccine protection, and improved DNA repair, but benefits stay unproven. Usually well tolerated, though it can raise blood levels of many medications. (Full Review)

Protocol

Dose
100–350 mg/day
Standardized dry extract, 100 mg one to three times daily
Frequency
2–3× daily
Divided doses taken with food to reduce stomach upset
Extract Type
Standardized
Pentacyclic-alkaloid-standardized or alkaloid-free water-soluble extract
Time to effect
Joint Symptom Relief
~1 week
Some arthritis pain relief appeared within the first week
Immune Endpoints
8+ weeks
Immune-related endpoints measured over 8 weeks or more
Fair Trial
Several weeks
Several weeks at a consistent dose to judge benefit

Benefits

Contraindications
  • Pregnancy, breastfeeding, or trying to conceive
  • Organ transplant recipients or immunosuppressant use
  • Active autoimmune disease (unless supervised)
  • Bleeding disorders or scheduled surgery (stop ≥2 weeks prior)
  • Significant kidney or liver disease
  • Children
    •
Key Interactions
  • CYP3A4-metabolized drugs (statins, calcium channel blockers, some benzodiazepines)
  • Antiretroviral protease inhibitors (ritonavir, atazanavir)
  • Anticoagulants and antiplatelets (warfarin, clopidogrel, aspirin)
  • Antihypertensives (lisinopril, amlodipine)
  • Immune-stimulating botanicals (echinacea, astragalus)
    •

Risk & Side Effects

  • High:
  • Medium: Gastrointestinal disturbances
    •
  • Low: Drug interactions via liver enzyme inhibition; immune overstimulation / autoimmune flare; acute kidney injury; hepatotoxicity; hypotension and bradycardia
    •
  • Speculative: Increased bleeding risk; hormonal / estrogen-receptor effects
    •

Monitoring

Marker Target Why
hs-CRP < 1.0 mg/L Tracks systemic inflammation, the main target of use
CBC with differential Healthy lymphocyte-to-neutrophil balance Detects immune-cell shifts consistent with the plant's immune activity
ALT / AST ALT < 25 U/L (women), < 33 U/L (men) Screens for the rare liver-injury signal linked to herbal supplements
eGFR / creatinine eGFR > 90 mL/min/1.73m²; creatinine mid-reference Screens for the rare acute kidney injury signal
Blood pressure 110–125 / 70–80 mmHg Detects additive blood-pressure lowering from tetracyclic alkaloids or co-supplements

Cadence: Baseline, recheck at 4–8 weeks after starting, then every 6–12 months

Qualitative Assessment

  • Joint pain and stiffness
  • Energy and fatigue
  • Digestive tolerance
  • General well-being
Not medical advice. Educational distillation of a single evidence review. Confirm any decision with a qualified clinician, especially in the presence of prescription drugs or chronic conditions.