Uncaria tomentosa
·
Rubiaceae
·
Mediterranean basin, tropical Asia, Africa

Cat's Claw

Hawk's claw, Pot hook, Sparrowhawk nail, Una de gato

Useful parts

Bark, Roots

Key actions

Antihypertensive, Anti-inflammatory, Immunostimulant, Antimicrobial

Active compounds

Alkaloids, Glycosides, Terpenoids, Sterols, Saponins

This Site is for Educational Use Only: The information on this page is for educational and informational purposes only and is not intended as medical advice, diagnosis, or treatment. I am not a licensed medical professional. Always consult a qualified healthcare provider before using any medicinal plants, especially if you are pregnant, nursing, taking medications, or have a medical condition.

Possible Proposed Uses

  • Hypertension
  • Arthritis
  • GI disorders
  • Chronic fatigue
  • Parasites
  • Asthma
  • Cancer
  • Improve wound healing
  • Immune stimulant
  • Inflammation
  • Common cold

Mechanism of Action

  • May stimulate immune system
  • Reduces inflammation (lab evidence)

Possible Side Effects

  • Headache
  • Dizziness
  • Vomiting
  • Allergies

Possible Drug Interactions

  • Avoid with anticoagulants
  • Avoid with antiretrovirals
  • Avoid with antihypertensives
  • Avoid with immunosuppressants

Abigail's notes

Cat's Claw is a climbing vine native to the Amazon rainforest, and yes I am also wondering if anyone is allowed to grow this up the side of their house because I want that. Someone look into the HOA regulations and report back.

It's anti-inflammatory, antioxidant, and an immune tonic, which is a solid three-for-one. It works best taken alongside other immune enhancing herbs rather than flying solo, so this is a good one to think about in combination rather than in isolation. It can help with chronic infections and is considered beneficial for degenerative disease management.

In South America it has a long history of use for its anti-tumor properties, which is one of those traditional applications that deserves way more research attention than it currently gets. Funny how that works with cancer-adjacent plants. Huh. Anyway.

The Amazon rainforest connection is also worth saying out loud: cat's claw is yet another reason to be genuinely angry about deforestation. We are continuously cutting down one of the most biodiverse and medicinally rich ecosystems on the planet. For what! Stop it!

Safety note: Do not take during pregnancy, and worth knowing that it may have some contraceptive properties so keep that in mind depending on where you are in life. Nausea is a possible side effect for some people. As with most immune modulating herbs, if you're on immunosuppressant medications check with your provider before adding this one in.

Last updated on:
May 20, 2026

Deeper research options for you (because I would never ask you to just take my word for it)

Cat's Claw https://www.ncbi.nlm.nih.gov/books/NBK548323/

Cat's claw's therapeutic uses https://www.ebsco.com/research-starters/health-and-medicine/cats-claws-therapeutic-uses

Cat's claw: an Amazonian vine decreases inflammation in osteoarthritis https://pubmed.ncbi.nlm.nih.gov/17210508/

Herbal Remedies by Andrew Chevallier

Disclaimer: The content on this website is provided for informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. No provider-patient relationship is created by use of this site. The author makes no representations regarding the accuracy or completeness of the information and assumes no liability for any adverse effects resulting from the use of plants or remedies described herein.

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