Joint Health

Cat's Claw

Also known as: Uncaria tomentosa, Una de gato

Evidence

Amazon rainforest herb with anti-inflammatory and immune-modulating properties.

Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.

Add Pure Encapsulations Cat's Claw to your stack — free

The highest-scored Cat's Claw product in our catalog (86/100). Track dose and overlaps in the app.

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Every Cat's Claw product we have scored

#	Product	Score	Per serving
1	Pure Encapsulations Cat's Claw	86 A-	$0.53
2	Nutricost Cat's Claw Capsules	86 A-	$0.25
3	Bluebonnet Nutrition CAT'S CLAW BARK EXTRACT	78 B+	$0.46
4	Herb Pharm Cat's Claw	76 B+	$0.38
5	Nature's Way Cat's Claw Bark	71 B	$0.44

Scored on dose accuracy, form, label transparency and third-party testing. Per-serving cost is list price divided by servings per container. No brand pays to be listed or ranked.

Common questions

How much Cat's Claw should I take?

The typical range is 250-350mg standardized extract. 4-8 weeks

When should I take Cat's Claw?

With or without food. Optional.

Which form of Cat's Claw is best?

Standardized extract — Alkaloid content. Other forms in the catalog: Capsules.

Is Cat's Claw safe?

Commonly reported: GI upset, Headache, Dizziness. Serious warnings: Immune effects (autoimmune caution). Safe at moderate doses

Which Cat's Claw supplement scores highest?

Pure Encapsulations Cat's Claw, at 86/100. Scored on dose accuracy, form, label transparency and third-party testing — no brand pays to be listed or ranked.

Primary uses

Joint inflammation
Immune support
Arthritis

How it works

Anti-inflammatory
Immune modulation
Antioxidant

Dosage

Typical range: 250-350mg standardized extract
Timing: With or without food
With food: Optional
Duration: 4-8 weeks
Special populations: OA, RA (adjunct), immune support

Forms

Standardized extract
Capsules

Safety

Common side effects

GI upset
Headache
Dizziness

Contraindications

Pregnancy
Autoimmune disease (relative)
Before surgery

Products containing Cat's Claw

Top-scoring supplements in our catalog that list Cat's Claw on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.

Pure Encapsulations

Nutricost

Bluebonnet Nutrition

CAT'S CLAW BARK EXTRACT

Herb Pharm

Evidence notes

Amazonian joint remedy

Grade B: Some human trials support key claims; further confirmation needed.

Related in Joint Health

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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.