Cat's claw, or uña de gato, harvested from the inner bark of a vine that grows wild in the highlands of the Peruvian Amazon, where the Ashaninka people have used it for generations.

Allergy Research Group uses the inner bark only. That single decision is the difference between a characterised botanical extract and ground-up plant material, and it is the reason this one has a following among practitioners.

Hypoallergenic capsules with a three-item excipient list. Simple, traceable, and made to the standard the brand has held for more than 45 years.

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