Common Names: Cat’s claw, uña de gato (note: not to be confused with plants like cat’s foot or devil’s claw) Scientific Names: Uncaria tomentosa, Uncaria guianensis Background • Cat’s claw is a climbing vine native to the Amazon and surrounding tropical regions of Central and South America. • The species most often encountered are U. tomentosa and U. guianensis. In the U.S., U. tomentosa is the more commonly used in supplements. • Traditionally, Amazonian cultures have used cat’s claw for