Tribulus terrestris, more commonly known as Puncture Vine, occurs naturally throughout China, India, western Asia, southern Europe and Africa, and the southwestern United States. Its common name is a reference to the assertion that the spines that cover the fruit of the plant are so fierce that they are capable of puncturing bicycle tires. This feature has given rise to several other descriptive common names, such as Devil's Thorn, Caltrops and Cat's Head.
Due to the potential hormonal effects of Tribulus terrestris, this herb should not be used during pregnancy or while nursing or by anyone with a history of a hormone-driven condition.
