Ingredient Overview
Cat’s claw is a climbing tropical plant named for its curved, claw-like structures. Uncaria tomentosa bark has a history of use in South American herbal preparations.
The curved structures that give the plant its common name belong to the living vine, while the harvested bark supplies this ingredient. Its South American herbal background is linked with the use of that bark. Oxindole alkaloids are among the constituents associated with concentrated cat’s claw preparations.