Cat's Claw Liquid Extract 4 fl oz, Planetary HerbalsCat's Claw Liquid Extract, Una de Gato Herbal Supplement Peruvian Botanical Treasure Cat's claw (Uncaria tomentosa) is a woody vine that grows in the Peruvian Amazon rain forest. Indigenous people have utilized this renowned plant for hundreds of years. Modern research has identified a group of constituents known as indole alkaloids that have been found to enhance macrophage activity in animal studies. Planetary Formulas Cat's Claw uses only the inner