Cat's Claw Bark, 100g loosepack

Cat's claw is a plant. Two species of cat's claw, Uncaria tomentosa and Uncaria guianensis, are of primary interest for use as medicine. Uncaria tomentosa is most commonly used in the U.S., and Uncaria guianensis is typically used in Europe.

Cat’s claw is most commonly used for improving symptoms of both osteoarthritis and rheumatoid arthritis.

It is also used for various digestive system disorders including swelling and pain (inflammation) of the large intestine (diverticulitis), inflammation of the lower bowel (colitis), inflammation of the lining of the stomach (gastritis), stomach ulcers, hemorrhoids, and leaky bowel syndrome.

Some people use cat’s claw for viral infections including shingles (caused by herpes zoster), cold sores (caused by herpes simplex), and AIDS (caused by human immunodeficiency virus (HIV)).

Cat’s claw is also used for chronic fatigue syndrome (CFS), wound healing, parasites, Alzheimer’s disease, asthma, hay fever, cancer (especially urinary tract cancer), a particular type of brain cancer called glioblastoma, gonorrhea, dysentery, birth control, bone pains, and "cleansing" the kidneys.

Cat's claw contains chemicals that might stimulate the immune system, kill cancer cells, and fight viruses.