Uncaria tomentosa, Uncaria guianensis. Family: Rubiaceae
una de gato
Cat's claw is a climbing vine. It grows in many countries in Central and South America,
especially in the Amazon. There are 2 species, Uncaria tomentosa and Uncaria guianensis,
that have been used to treat some health issues. These include arthritis, digestive
problems, and viral infections.
The active ingredients are extracted from the bark and root of the vine. Both types
of Uncaria are currently being studied. There have been claims that it may help with
osteoarthritis, rheumatoid arthritis and Alzheimer disease. But further research is
needed before experts can draw any conclusions.
Cat’s claw is taken as a bark decoction. You take it by boiling a specific amount
of the herb in water. It has different alkaloids that cause its effects. These include
rhynchophylline and isorhynchophyllin.
Medically valid uses
There are no proven uses for cat's claw.
There may be benefits that have not yet been proven through research.
Cat's claw has been used for treating digestive issues. Pentacyclic oxindole alkaloids
found in cat's claw are claimed to modulate the immune system. They do this by increasing
the activity of white blood cells. They also increase the levels of Interleukin-1.
Some claims suggest that cat's claw treats some viral infections. Cat's claw is also
said to have antioxidant, anti-mutagenic (preventing mutation), and anti-inflammatory
effects. Other claims suggest that cat's claw may help treat AIDS and cancer. It may
also help treat ulcers.
Cat's claw comes in oral tablets, tea and capsules. Follow instructions on the package
for the correct dose.
Side effects, toxicity, and interactions
When taken by mouth, cat's claw may cause headaches, dizziness, and vomiting.
Studies show that cat's claw isn’t toxic at standard dosing levels. At higher doses,
it may be toxic.
Women who are pregnant or breastfeeding should not use cat's claw.
There are no known significant food or medicine interactions. Because cat's claw may
stimulate the immune system, people with certain conditions shouldn’t use it. These
include people with an overactive immune system. Cat's claw may also affect blood
pressure during or after surgery.