The e spike from the LH stimulation of HCG may also be the reason some people don't respond to Tribulus all that well. For a long time it was thought that since Trib increased LH, it was the T elevation that gave an increase in sex drive. But it may have been the increase in e. Most experienced Trib users willl tell you that when the dosages are increased over 2 grams it seems to have an opposite effect, lowering libido and ejaculate volume. Recently some people have complained of slight gyno symptoms on high dosages of Trib. Something to think about.