CAT'S CLAW
Cat's claw ( Uncaria tomentosa ) is a woody vine native to the Amazon rainforest and other tropical areas of South and Central America. It is named after the hook-like thorns that grow along its vine. The bark and root of this herb have been used by South Americans going back to the Inca civilization to treat a variety of health problems including arthritis, stomach ulcers, inflammation, dysentery, and fevers. It was also used as a form of birth control. Test tube studies indicate that cat's claw may stimulate the immune system, help relax the smooth muscles (such as the intestines), dilate blood vessels (helping lower blood pressure), and act as a diuretic (helping rid the body of excess water). It also has antioxidant properties, helping rid the body of particles known as free radicals that damage cells. Although few scientific studies have investigated the safety and usefulness of this herb, it has been used traditionally to treat osteoarthritis (OA). One study indicates that it may help relieve pain from knee OA without side effects. Cat's claw has been suggested as a treatment for rheumatoid arthritis (RA) based on its anti-inflammatory properties. One small study showed a positive effect when cat's claw was taken by people who were also taking sulfasalazine or hydroxychloroquine to treat RA. Although cat's claw may help reduce inflammation, there is no evidence it stops the progression of the disease. For that reason, RA should be treated with conventional medications, which can put the disease into remission. Cat's claw is being studied for a number of other possible uses, although it is too early to say whether it will be effective. Among the conditions cat's claw is being studied for are HIV, Crohn's disease, multiple sclerosis, systemic lupus erythematosus (SLE or lupus), and Alzheimer's disease.
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