What is Cat's Claw (Una de Gato)?

Cat's Claw is a large tropical vine native to the Amazon rainforest, named for the curved, claw-like thorns that line its stem. For at least 2,000 years, indigenous Peruvian communities — especially the Asháninka people — have prepared its inner bark as a tea or decoction to treat inflammation, infections, and digestive complaints. It reached wider global attention in the 1970s when Austrian researcher Klaus Keplinger began documenting its alkaloid content and potential therapeutic value.

How does Cat's Claw (Una de Gato) work?

Cat's Claw works mainly by calming an overactive immune response and reducing the chemical signals that drive chronic inflammation — think of it as a volume dial that turns down the body's inflammatory noise without completely muting its defenses. Its alkaloids appear to support white blood cell activity, while its antioxidants help protect cells from damage caused by free radicals. It also seems to ease gut inflammation by supporting a healthy intestinal lining.

What forms does Cat's Claw (Una de Gato) come in?

Standardized bark extracts in capsule or tablet form are the easiest way to get a consistent dose, and most clinical trials have used these. Liquid tinctures and teas are traditional and still widely used, though potency can vary. Some products are standardized to a specific alkaloid percentage (e.g. 3% oxindole alkaloids), which is the most reliable indicator of quality. TOA-free (tetracyclic oxindole alkaloid-free) extracts are marketed as superior, though the clinical evidence supporting that specific claim is limited.

Where it comes from:

The Asháninka of Peru used Cat's Claw to treat conditions ranging from arthritis and inflammation to stomach problems and infections — and considered it one of their most sacred healing plants. Spanish missionaries documented its use as far back as the 17th century. Modern scientific interest began in earnest in the 1970s–80s in Europe, leading to clinical research in Austria and Germany, and it became a popular supplement in North America and Europe by the 1990s.

What does Cat's Claw (Una de Gato) help with?

• Rheumatoid arthritis: Cat's Claw helps dial down the immune system's attack on its own joints, reducing the swelling, tenderness, and morning stiffness that define rheumatoid arthritis. Clinical trials have shown meaningful reductions in painful and swollen joints when taken alongside standard treatment.
• Osteoarthritis and joint pain: By reducing inflammation in joint tissue, Cat's Claw can ease the pain and stiffness of wear-and-tear arthritis — particularly in the knees. People in clinical studies reported less pain with activity and improved knee function after several weeks of use.
• Immune system support: The alkaloids in Cat's Claw help activate and regulate white blood cells, making the immune system more responsive without over-stimulating it. It has a long traditional history as an infection-fighter and is used today to support immune resilience, particularly during periods of stress or illness.
• Gut inflammation and leaky gut: Cat's Claw has been used traditionally — and is increasingly studied — for its ability to soothe the intestinal lining and reduce gut inflammation. It may help people with inflammatory bowel conditions by calming the immune activity in the gut wall.
• Knee pain: In trials focused specifically on knee osteoarthritis, Cat's Claw extract reduced pain during movement and improved daily function. The effect is thought to come from reducing inflammatory compounds in the joint fluid.
• Chronic inflammation: Cat's Claw blocks some of the key messengers the body uses to trigger and sustain inflammation — making it potentially useful for people with low-grade chronic inflammation that underlies many long-term health issues.
• Viral infections (cold and flu support): Traditional Amazonian healers used Cat's Claw for fevers and infections, and some compounds in the plant have shown antiviral activity. It is commonly used as a complementary support during colds and flu, though direct clinical evidence in humans is limited compared to its anti-inflammatory data.
• DNA damage repair support: Some research suggests Cat's Claw may help the body's natural DNA repair processes, possibly related to its antioxidant compounds. This is an early but interesting area of research relevant to people exposed to significant environmental stressors.
• Lyme disease support (adjunct): Cat's Claw is a popular complementary option among integrative practitioners supporting Lyme disease recovery, primarily for its immune-modulating and anti-inflammatory effects. Clinical evidence for Lyme specifically is anecdotal and limited, but it is widely used in this context as a supportive, not primary, therapy.

What can Cat's Claw (Una de Gato) help prevent?

• Reduction in progression of joint damage in early rheumatoid arthritis (used alongside standard care)
• Reduction in oxidative DNA damage (emerging evidence)

Which foods are rich in Cat's Claw (Una de Gato)?

1. Turmeric: Contains curcumin, which works along the same anti-inflammatory pathways as Cat's Claw — pairing them amplifies the overall effect on joint and gut inflammation.
2. Ginger: A natural COX inhibitor that reduces joint inflammation and pain through a similar mechanism, making it a strong dietary complement for arthritis support.
3. Fatty fish (salmon, sardines, mackerel): Rich in omega-3s that reduce systemic inflammation, directly supporting the same conditions Cat's Claw targets — especially rheumatoid arthritis and chronic inflammation.
4. Dark berries (blueberries, cherries, blackberries): High in proanthocyanidins and anthocyanins — the same class of antioxidants found in Cat's Claw — helping reinforce its free-radical-neutralizing and anti-inflammatory effects.
5. Bone broth: Provides collagen precursors and glycosaminoglycans that support joint tissue and gut lining integrity, complementing Cat's Claw's joint and digestive benefits.

Practical Tips:

Cat's Claw is not found in food — it is an extract from the bark of a tropical vine. Pair it with an anti-inflammatory diet rich in omega-3s, antioxidant-rich produce, and fermented foods to get the most out of its joint and immune benefits. Foods to limit: Processed seed oils and fried foods (pro-inflammatory, counteract Cat's Claw's anti-inflammatory effects), Excess alcohol (can worsen gut permeability and amplify Cat's Claw's blood-thinning potential), High-sugar foods (fuel systemic inflammation, working against the treatment's main purpose).

What are the side effects of Cat's Claw (Una de Gato)?

• Nausea or stomach upset (most common, usually mild)
• Diarrhea or loose stools (especially at higher doses)
• Dizziness or headache (occasionally reported)
• Low blood pressure (particularly at high doses)
• Allergic skin reactions (rare)
• Increased bleeding time (relevant if taking blood thinners)
• Not recommended during pregnancy or breastfeeding

Good to know:

Cat's Claw has a solid safety record in clinical trials at typical doses, with most people tolerating it well. Side effects are usually mild and digestive in nature. It should be avoided during pregnancy, by people on immunosuppressants, and by those scheduled for surgery.

How much Cat's Claw (Una de Gato) should you take?

• Recommended daily: Standardized bark extract: 250–350 mg once or twice daily (standardized to 3% oxindole alkaloids). Traditional bark powder: 1–3 g per day in capsule form. Tea/decoction: 1–2 cups daily prepared from 1 g dried bark per cup.
• Best time of day: No strong preference — morning or evening with a meal works well for most people. If taking twice daily, split the dose morning and evening.
• With or without food: Best taken with food to reduce the chance of stomach upset.
• Time to effect: Joint and immune benefits typically emerge after 4–8 weeks of consistent use. Digestive comfort improvements may be noticed within 1–2 weeks.
• How long to take it: Commonly used for 8–12 week courses with a 2–4 week break between cycles. Long-term continuous use has not been formally studied beyond 52 weeks, so cycling is prudent. Consult a healthcare provider for ongoing use.