From the Manufacturer:
Cats Claw (Una de Gato, Uncaria Tomentosa) promotes and enhances immune system function, anti-viral, anti-inflammatory, and anti-rheumatic activities. Cats Claw has been shown to help arthritis, allergies, candida, chronic fatigue, fibromyalgia, gastritis, ulcers, cancer, cleanses the intestinal tract, and hormonal imbalances.