Cat's Claw Bark, 1000 mg, 60 Tablets - Source NaturalsSource Naturals Cat's Claw Bark, 1000 mg, 60 Tablets, is a dietary supplement derived from the inner bark of the Uncaria tomentosa plant, which grows in the rain forests of the Peruvian Amazon. Indigenous Peruvians, including the ancient Incas, have used this herb for centuries. The inner bark contains unique active constituents that support the body's immune system. The harvesting process of the bark does not require the destruction of the plant,