From the Manufacturer:
Cat's Claw (Una de Gato) is known for its ability to strengthen the immune system, its anti-inflammatory properties for people with arthritis, Cats Claw is a plant that grows in the highlands of the Peruvian rainforest. Studies seem to show that Cat's Claw is effective as a pain reliever for people with osteoarthritis and rheumatoid arthritis. It is believed to work by switching off the genes that are involved in inflammation.
Cat's claw is a plant that grows in the highlands of the Peruvian rainforest. Our cat's claw is wild crafted and ecologically harvested.