Cat's claw (Uncaria tomentosa) is a tropical vine that can grow up to 98 feet (30 meters) tall. Its name comes from its hooked thorns, which resemble the claws of a cat.

It is found mainly in the Amazon rainforest and in other tropical areas of South and Central America.

The two most common varieties are Uncaria tomentosa and Uncaria guianensis. The former is the type often used in supplements in the United States.

The bark and root have been used for centuries in South America as a traditional medicine for many conditions, such as inflammation, cancer, and infections.

Cat's claw supplements can be taken as a liquid extract, capsules (GNC Stores), powder, or tea.

Cat's claw is a tropical vine used for centuries as a traditional medicine. Today, it's commonly consumed as a supplement due to its alleged health benefits.

Potential Health BenefitsCat's claw has soared in popularity as a herbal supplement due to its alleged health benefits, though only the claims below are backed up by sufficient research.

May Boost Your Immune SystemCat's claw may support your immune system, possibly helping fight infections more effectively.

A small study in 27 men found that consuming 700 mg of cat's claw extract for 2 months increased their number of white blood cells, which are involved in combating infections