I read somewhere that a suprising number of woman develop a lower production of test than they should be. this is a recent thing I heard, with no studies that Ive read, or any inclination that it's actually true. I suspect that if this is true in the coming years there may indepth studies done on tribulus, as a treatment to this possable problem. so if your female sigificant other/ or woman if you seem to have developed low libido, unaccountably gaining fat, and other conditions related to low test you might want to get your levels tested, and ask about this as a possable treatment. having low test is undisiarible for anyone, once you know what it does.