Tribulus Terrestris Powder Specifications: 40%, ISO, GMP,HACCP,SGS certified free samples can be provid ... .Appearance:Brown Yellow Powder Specifications of ProductContent Specifications: 40%, Protodioscin by HPLC 40%,60%,90%Total Saponins by UV ProtodioscinMolecular Formula :C33H40O15Molecular ...