Cat's Claw or Uña de Gato (Uncaria tomentosa) is an herb that grows wild in the highlands of the Peruvian Amazon. The native Ashanica Indians have used the inner bark of cat's claw for possibly thousands of years to support immunity and digestion. Recent research in Europe and China has identified the alkaloid compounds in cat's claw that possess antioxidant properties. They have been shown to be potentially beneficial for healthy immune and gastrointestinal function. NutriCology’s cat's claw is harvested with environmental consciousness and only the inner bark is used.