Pure Encapsulations

Cat’s Claw

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The Promise

Herbal extract standardized for consistent alkaloid content — Uncaria tomentosa inner vine bark

A concentrated cat's claw extract derived from the inner vine bark of Uncaria tomentosa.

Standardized alkaloid and polyphenol content

Extract contains 3% oxindole alkaloids and 15% polyphenols to ensure consistent constituent levels.

Measured POAs and TOAs

Provides 2.73% POAs (pentacyclic oxindole alkaloids) and 0.27% TOAs (tetracyclic oxindole alkaloids).

Capsule delivery

Supplied in vegetarian cellulose capsules for a non-gelatin option.

Includes fat-soluble vitamin C

Contains 10 mg ascorbyl palmitate (a fat-soluble form of vitamin C) per capsule.

Why It Works

Why this formulation matters — Constituent profiles and forms

Key ingredient forms and amounts are listed to clarify what you’re getting in each capsule.

01

Oxindole alkaloid percentage specified

Oxindole alkaloids are quantified at 3% total, which is broken down into measured POA and TOA percentages.

02

Polyphenol content noted

Polyphenols are provided at 15%, indicating standardized phenolic content alongside alkaloids.

03

Ascorbyl palmitate included

Vitamin C is present as ascorbyl palmitate, a fat‑soluble derivative of ascorbic acid, at 10 mg per capsule.

04

Plant part and species identified

The source is Uncaria tomentosa inner vine bark, specifying species and plant part used for the extract.

Reviews

Customer Reviews

Your Journey

How to take it — Serving, timing, and precautions

Simple, flexible dosing and a concise safety note to help you fit this into daily routines.*

Serving range

Dose flexibility

Take 1–6 capsules per day in divided doses.

With meals

Take with food

Take capsules with meals.

Pregnancy and lactation

Avoid if pregnant or breastfeeding

Not to be taken by pregnant or lactating women.

Medication caution

Consult your healthcare practitioner

If you are taking anticoagulant (blood‑thinning) or antihypertensive (blood‑pressure) medications, consult your healthcare practitioner before use.

Product education

Suggested Use: 1-6 capsules per day, in divided doses, with meals

Cat’s Claw – Cat’s claw extract is derived from the inner vine bard and is standardized to contain 3% alkaloids and 15% polyphenols, providing potential joint, cardiovascular, immune and gastrointestinal function support. This cat’s claw extract contains 2.73% POAs and 0.27% TOAs.

What Is It?

Cat’s claw, Uncaria tomentosa, is an herbal extract. It has been used traditionally in Peru for over 2,000 years. Alkaloids, phenols, sterols and glycosides comprise some of the naturally occurring constituents of this herb.

Uses For Cat’s Claw

Joint Health: In a 52-week, randomized double blind trial, cat’s claw extract promoted joint comfort in volunteers. A 4-week study also suggests that cat’s claw has the ability to promote joint comfort, in part by moderating prostaglandin metabolism. Other mechanisms of action that may account for these effects include modulation of both oxidative stress and cytokine production.*

Cardiovascular Health: Cardiovascular protective properties include support for healthy vascular and platelet function.*

Immune Support: Cat’s claw alkaloids have been specifically associated with enhancing immune system cell function, including phagocytosis and macrophage activity.*

Gastrointestinal Health: Studies involving cultured gastric epithelial cells suggest that cat’s claw may provide important antioxidant protection for gut health.*

What Is The Source?

This extract is sourced from the inner vine bark of Cat’s claw (Uncaria tomentosa). It is standardized to contain 3% oxindole alkaloids (2.73% POAs and 0.27% TOAs). Vitamin C (ascorbyl palmitate) is derived from corn dextrose fermentation.

Are There Any Potential Side Effects Or Precautions?

Mild gastrointestinal discomfort has been reported in some cases. Not to be taken by pregnant or lactating women.

Are There Any Potential Drug Interactions?

Cat’s claw may be contraindicated for individuals who are taking blood thinning or antihypertensive medications due to a potential synergistic effect.

Supplement record

Review serving details and ingredients for this product.

Supplement Facts:
Suggested Use: 1-6 capsules per day, in divided doses, with meals
each vegetable capsule contains:
Ingredients AMT %DV
cat's claw (Uncaria tomentosa) extract (standardized to contain 3% oxindole alkaloids) 450 mg. -
vitamin C (as ascorbyl palmitate) 10 mg. -
Other Ingredients: ascorbyl palmitate, vegetarian capsule (cellulose, water) Not to be taken by pregnant or lactating women.
(-) There is no %DV or the manufacturer has not provided this data.