Dietary Supplement Dragon Herbs uses the Bulgarian variety of Tribulus terrestris in this powerful adaptogenic Qi and Jing tonic. Ca Prop 65 Warning: The use of this product will expose you to lead, a substance known to the state of California to cause birth defects or other reproductive harm. Daily breathing in CA alone will result in lead exposure exceeding CA Prop 65 warning level for birth defects or reproductive harm. The lead content of this product is lower than the FDA standard for lead in bottled water.Dragon Herbs