Raintree Formulas Cat's Claw comes in a 500mg capsule. Each bottle contains 100 capsules of pure herb. Raintree products are unmatched on the market: pure & natural, wildcrafted Graviola, no added binders, fillers or additives, recently harvested fresh rainforest herbs. Cat's Claw (Uncaria tomentosa), a vine named for the hooked thorns resembling cat claws on its twigs that grows wild in many countries of Central and South America, especially in the Amazon Rainforest. For centuries, native tribes use its inner bark to prevent or treat disease. Today, Cat's Claw has been researched for its anti-viral potential, as well as it ability to bring balance to an overstressed immune system. It contains alkaloids that can stimulate the white blood cells. Cat's Claw is rich in antioxidants. Raintree herbs are hand-harvested from their natural wild habitat at their optimal potency. Grown without the use of chemicals, fertilisers, pesticides or herbicides, never fumigated or irradiated.