Nature’s Way Cats Claw Standardized Description: Commonly Used as a Tonic to Promote Well-Being Cat’s Claw extract is standardized to 4% alkaloids (measured as isoteropodine) from the bark of wild-harvested plants in Peru and Brazil. It is a popular South American folk medicine commonly used as a tonic to promote well-being. Nature’s Way standardized Cat’s Claw extract is technically advanced herbal product. Standardization assures specific, measurable levels of important compounds that provided beneficial activity in the body. Disclaimer These statements have not been evaluated by the FDA. These products are not intended to diagnose, treat, cure, or prevent any disease.