About Cat's Claw

Herbal supplement known for its potential to support immune health, reduce inflammation, and promote overall wellness.

Effectiveness Scores

Joint Health: 8.0/10 (moderate evidence).
Cat's claw has been found to be a real game changer when discussing joint health. This is especially true for individuals suffering from rheumatoid arthritis and osteoarthritis.
Cat’s Claw helps by calming the body’s inflammatory response, giving your joints a break from the constant irritation. Studies have also found that side effects are minimal. This suggests that Cat's Claw may be as safe as it is effective.
Now it's not a cure for arthritis and joint-related issues, but it shows promising results for managing joint pain.
Why this rating: High-quality clinical studies with solid mechanism understanding. Rating limited by number of studies and sample size.
Cancer Treatment Support: 6.0/10 (moderate evidence).
Cat's claw shows promise for managing chemotherapy side effects. Two clinical trials have specifically tested its effectiveness for this purpose. But these trials came to two different results.
In a breast cancer study, Cat’s Claw helped protect immune cells, reduced DNA damage from chemo, and boosted the body’s natural antioxidant defenses. But in a colorectal cancer study, it didn’t show the same benefits. The second trial found no major changes in blood cell health or immune markers.
Why this rating: There's some evidence for this outcome, but findings are inconsistent.
Immune Support: 5.0/10 (moderate evidence).
Cat's Claw helps balance the immune system. Just as it calms inflammatory responses in joints, it also helps regulate overactive immune responses. Many long-term users claim to have fewer infections, less fatigue, and better overall resilience. This is especially present in people dealing with chronic conditions like Lyme disease.
But there are very few clinical trials to back up these claims. The best description is "Promising but not proven."
Why this rating: Strong preclinical mechanistic evidence and compelling user reports, but limited dedicated human immune function trials. Traditional use is well-documented, but clinical validation is insufficient.

Dosage & Timeline

Standard Dosages

Dried stem bark extract: 20-350 mg
Capsules: 300-500 mg
Specific Condition Dosages:
- Joint Support: 100 mg daily
- Cancer Treatment Support: 300 mg daily
- Immune Support: 250-350 mg daily

Results Timeline

Joint health improvement: 1-2 weeks for initial benefits
Immune Support: 1 week

All other outcomes may be noticed after extended use or lack enough studies to establish an effectiveness timeline.

Safety Information

Pregnancy and breastfeeding: Cat's Claw should be avoided during pregnancy due to the potential for uterine contractions. Its safety during breastfeeding is not well established, so it should be avoided unless prescribed by a healthcare provider.
Autoimmune conditions: People with autoimmune disorders (e.g., lupus, multiple sclerosis, rheumatoid arthritis) should consult with a healthcare provider before using Cat's Claw, as it may stimulate the immune system and exacerbate these conditions.
Blood pressure and bleeding: Cat's Claw may have a blood pressure-lowering effect, so people with low blood pressure should use it cautiously. It may also increase the risk of bleeding when combined with anticoagulant medications like warfarin or aspirin.
Surgery: Due to its potential to interfere with blood clotting, it is recommended to stop taking Cat's Claw at least two weeks before scheduled surgery
Drug interactions: immunosuppressants, anticoagulants, and CYP3A4 substrates.

Side Effects

Common side effects:

Upset stomach or nausea
Diarrhea
Mild headache

Rare side effects:

Allergic reactions (e.g., skin rashes or itching)
Low blood pressure (in rare cases)
May interact with blood thinners, causing an increased risk of bleeding
Worsening symptoms in people with Parkinson's disease

While side effects are generally mild, long-term use or high doses may cause gastrointestinal discomfort. It is advisable to start with a lower dose to assess tolerance.

Usage Information

Cat's Claw is expected to support immune health, reduce inflammation, promote joint health, and offer digestive support. It may also have potential anticancer and antioxidant benefits.

User Experience

Testimonials are typically positive.

Arthritis users report dramatic improvements: "Within 3 days pain almost went away" and "back to working out with weights" represent common themes.

Cancer patients report meaningful benefits: "For the last 2 days I have not taken a single pill for pain" from a Stage 4 colon cancer patient.

Pain relief benefits are typically noticeable within the first week. Immune benefits usually manifest within 2-4 weeks.

Alternative Names

Uncaria tomentosa, Uña de gato

Cat's Claw