Cat Claw, also known as Uncaria Tomentosa, is a woody vine found in the tropical jungles of South and Central America. This root bark resembles the Cat Claw with its claw-shaped thorns and is often used in herbalism for a variety of ailments. Cat Claw is known for its benefits in boosting your immune system, relieving rheumatoid arthritis symptoms, as well as relieving osteoarthritis.