Named after its hook-like horns, cat's claw (Uncaria tomentosa) is a woody vine native to the Amazon rainforest and other places in South and Central America. The bark and root have been used by South Americans for centuries to treat health problems including Arthritis
, Stomach Ulcers
, and Fever
s. 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 Muscle
s (such as the Intestine
s), dilate Blood vessel
s (helping lower Blood Pressure
), and act as a Diuretic
(helping the body get rid of excess water).
Cat's claw also has Antioxidant
properties, helping the body get rid of particles known as free radicals that damage cells. Scientists believe free radicals to contribute to health problems, including Heart
disease and Cancer
s can help neutralize free radicals and may reduce or even help prevent some of the damage they cause.
Some early studies suggest cat's claw may kill Tumor
cells in test tubes.
: Not many scientific studies have looked at the safety and effectiveness of cat's claw, but it has been used traditionally to treat osteoArthritis
(OA). One study found that it may help relieve Pain
from knee OA without any significant side effects.
: Cat's claw has been suggested as a treatment for rheumatoid Arthritis
(RA) because it may help reduce nflammation. One small study of people who were already taking sulfasalazine or hydroxychloroquine to treat RA found that those who also took cat's claw had fewer Pain
ful, swollen joints than those who took a placebo (dummy pill). But although cat's claw may help reduce Inflammation
, there is no evidence to show that it stops joint damage from getting worse. For that reason, RA should be treated with conventional medications, which can stop joint damage.
Further research: Cat's claw is being studied for a number of other possible uses, including HIV, Crohn
's disease, Multiple Sclerosis
, systemic Lupus
erythematosus (SLE or Lupus
), endometriosis, Kidney
problems, and Alzheimer
's disease. More research is needed before scientists can say whether it is effective.
Plant Description: Cat's claw is a thorny vine that can climb as high as 100 feet. It grows mostly in the Amazon rainforest, as well as tropical areas in South and Central America. Much of the cat's claw sold in the United States was grown in Peru.
Cat's claw got its name from the curved, claw-like thorns that grow on its stem. The root and bark of cat's claw are the parts used for medicine.
Cat's claw contains many types of chemicals that help reduce Inflammation
, such as tannins and sterols, and fight Virus
es, such as quinovic Acid
Cat's claw preparations are made from the root and bark of the cat's claw vine. How effective the root and bark are can depend on what time of year the plant was harvested.
Available Forms: The bark of the cat's claw vine can be crushed and used to make tea. Standardized root and bark extracts (containing 3% alkaloids and 15% phenols) are also available in either liquid or capsule forms.
How to Take It: Pediatric. No one has studied cat's claw in children, so no one knows whether it is safe. Do not give a child cat's claw except under your doctor's supervision.
Adult: Tea: 1 to 10 g (1,000 mg) root bark in 8 ounces water; boil 10 to 15 minutes, cool, and strain. Drink 1 cup, 3 times daily.
Capsules: 100 mg per day for osteoArthritis
; 250 to 350 mg per day for Immune
Precautions: The use of herbs is a time-honored approach to strengthening the body and treating disease. Herbs, however, can trigger side effects and can interact with other herbs, supplements, or medications. For these reasons, you should take herbs with care, under the supervision of a health care practitioner.
Cat's claw appears to have few side effects. However, there have not been enough scientific studies of cat's claw to determine its safety. Some people have reported Dizziness
, and Diarrhea
when taking cat's claw. The Diarrhea
or loose stools tend to be mild and go away with continued use of the herb.
or nursing women should not take cat's claw, because it may cause miscarriage.
People with AutoImmune
, or those receiving organ transplants should not use cat's claw unless specifically directed by their physician because of its possible effects on the Immune
People with leukemia or low Blood Pressure
should not take cat's claw.
People with Kidney
disease should not use cat's claw without first aSkin
g their doctor.
Possible Interactions: If you are currently taking any of the following medications, you should not use cat's claw without first talking to your health care provider. Medications that suppress the Immune
system -- In theory, because cat's claw may stimulate the Immune
system, it should not be used with medications that suppress the Immune
system. Those include cyclosporine or other medications prescribed following an organ transplant or to treat an AutoImmune
Blood-thinning medications -- Cat's claw may increase the risk of Bleeding
, especially if you also take blood-thinners such as aspirin, warfarin (Coumadin), or clopidogrel (Plavix).
s (water pills) -- Cat's claw may act as a Diuretic
, helping the body get rid of excess fluid. If you also take Diuretic
s, which do the same thing, you could be at risk of developing an electrolyte imbalance.
medication -- Cat's claw may lower Blood Pressure
. If you take medication for high Blood Pressure
, taking cat's claw may cause your Blood Pressure
to be too low.
Other medications -- Cat's claw may interfere with some medications that are processed by the Liver
. If you take any medications, check with your doctor before taking cat's claw.
Source: Cat's claw | University of Maryland Medical Center http://umm.edu/health/medical/altmed/herb/cats-claw#ixzz3itHrGc4J
University of Maryland Medical Center
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