... family Zygophyllaceae, native to warm temperate and tropical regions of the Old World in southern Europe, southern Asia, ... Goathead are the most widely used.2. Descriptions and Specifications of ProductContent Specifications: : 40%, Protodioscin by HPLC 40%, 60%, ... mass and strength. Although such products are typically combinations of ingredients that include tribulus, rather than tribulus alone, the ...