Cat’s claw (Uncaria tomentosa) is a woody vine native to the Amazon rainforest and other tropical regions of Central and South America. Traditionally used in herbal medicine, cat’s claw has gained popularity for its potential immune-boosting, anti-inflammatory, and antioxidant properties. However, like any supplement, it may not be suitable for everyone.
In this article, we’ll explore the benefits of cat’s claw and important contraindications to consider before using it.
Health Benefits of Cat’s Claw
1. Supports Immune Function
Cat’s claw is rich in compounds like alkaloids and glycosides, which may enhance immune response. Some studies suggest it can stimulate white blood cell activity, helping the body fight infections more effectively.
2. Reduces Inflammation
Due to its anti-inflammatory properties, cat’s claw may help with conditions like arthritis, gout, and other inflammatory disorders. It inhibits inflammatory markers such as TNF-alpha, providing potential relief for joint pain.
3. Acts as a Powerful Antioxidant
The plant contains antioxidants that combat free radicals, reducing oxidative stress and potentially lowering the risk of chronic diseases like heart disease and cancer.
4. May Improve Digestive Health
Traditionally, cat’s claw has been used to treat stomach ulcers, gastritis, and leaky gut syndrome. Its anti-inflammatory effects may help soothe the digestive tract and promote gut healing.
5. Potential Antiviral and Antimicrobial Effects
Some research indicates that cat’s claw may have antiviral properties, particularly against viruses like herpes and HIV. However, more studies are needed to confirm its efficacy.
6. Supports Brain Health
Preliminary research suggests that cat’s claw may protect against neurodegenerative diseases like Alzheimer’s by reducing inflammation and oxidative damage in the brain.
Contraindications and Side Effects
While cat’s claw offers many benefits, it’s not suitable for everyone. Possible risks include:
1. Pregnancy and Breastfeeding
Cat’s claw may stimulate uterine contractions, increasing the risk of miscarriage. Pregnant or breastfeeding women should avoid it.
2. Autoimmune Disorders
Since cat’s claw can stimulate the immune system, it may worsen autoimmune conditions like lupus, multiple sclerosis, or rheumatoid arthritis.
3. Blood Pressure and Blood Thinning
Cat’s claw may lower blood pressure and slow blood clotting. Those on blood pressure medications or anticoagulants (like warfarin) should use caution.
4. Surgery and Bleeding Disorders
Due to its potential blood-thinning effects, cat’s claw should be discontinued at least two weeks before surgery to prevent excessive bleeding.
5. Allergic Reactions
Some individuals may experience allergic reactions, especially if sensitive to plants in the Rubiaceae family. Symptoms may include itching, rash, or dizziness.
6. Kidney Disease
High doses of cat’s claw may affect kidney function, so those with kidney disease should consult a doctor before use.
How to Use Cat’s Claw Safely
- Dosage: Typically, 250–1000 mg per day in capsule or extract form. Follow product guidelines.
- Tea: Steep 1–2 grams of dried bark in hot water for 10 minutes.
- Duration: Avoid long-term use without medical supervision.

Cat’s claw is a powerful herbal remedy with numerous health benefits, particularly for immune support and inflammation. However, it’s essential to consider potential contraindications, especially if you have underlying health conditions or take medications.
Always consult a healthcare provider before starting cat’s claw or any new supplement.
Have you tried cat’s claw?
Share your experiences in the comments below!
Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare professional before using herbal supplements.