Cat's Claw (Uncaria tomentosa)
Immunity & antioxidantsFunction & benefits
The bark of an Amazonian plant traditionally used to support joint comfort and a normal immune response; a study in healthy volunteers suggests its water extract supports DNA repair and protects cells from oxidative stress.
Dosage & how to use
| Recommended dose | 250–500 mg of standardised extract daily |
| Best time to take | With a substantial meal |
| Frequency | Once daily |
Best forms to choose
Water extract of cat's claw bark standardised for oxindole alkaloids, in capsules.
Important warnings
Not for use during pregnancy or breastfeeding, or by women trying to conceive
Not for people with autoimmune diseases (such as lupus or multiple sclerosis) or organ transplant recipients
Stop two weeks before surgery
Drug interactions
It interacts with immunosuppressants and blood thinners (warfarin) and may strengthen blood pressure drugs; it may inhibit CYP3A4 and so raise the blood levels of some medicines.
Related supplements
- Quercetin Phytosome (with Vitamin C)Immunity & antioxidants
- Daily MultivitaminsGeneral health & immunity
- Omega-3 Fish OilGeneral & heart health
- Vitamin D3 (Cholecalciferol)General health & bones
Scientific references
- Sheng Y et al. Phytomedicine 2001 — PMID: 11515717
Content last updated: 17 October 2026 · Based on published sources and research (EFSA / NIH / PubMed)
⚖️ Medical disclaimer: The information and data provided here are for health education and nutritional guidance only. They are not a medical diagnosis and never replace a direct consultation with your doctor or pharmacist. Always consult your doctor before starting any supplement, especially during pregnancy or breastfeeding or when taking long-term medication.