In humans, "T. terrestris has consistently failed to increase testosterone levels in controlled studies." [1][2][3]
Thanks for posting those studies, cheezeweezel.
I have heard about these negative studies before. The interesting thing is that two were performed on young men, who presumably had optimum testosterone levels to begin with. I'd like to see the studies repeated on say 45 year old men whose testosterone was measured to be in serious decline, and see if TT can raise testosterone in these cases.
Another consideration is that, if you are like me, and are wired for flight rather than fight, I actually think this disposition of personality may well be due to abnormally low testosterone (though unfortunately I have not had my testosterone levels tested, so this is speculation). So perhaps TT works best in people like me who may be low testosterone, and of a flight rather than fight disposition.
If TT did not raise testosterone in me, then it certainly must have altered something in order to effect these dramatic increases in "
I will hold my ground and fight" aggression I experienced when taking TT.
I remember once when a client said to my face that he would not pay the full money he owed me for some work I had done for him, making up some ridiculous reasons for not doing so. Normally I hate situations like that, because I just do not have the force of anger in me to deal with it. However, on this occasion, I just happened to had taken 1500 mg of TT two hours earlier (as I was on my way to the gym later that afternoon, and I took TT for the gym). As a result of taking this TT, as soon as I got this financial "slap in the face" from him, I uncharacteristically exploded in anger! I mean exploded, incredible hulk style. I was almost foaming at the mouth with anger! I was very surprised at this response myself! My words to him became so belligerent, that he soon changed his mind about not paying me the money he owed! A nice outcome — and one that would never have happened had I been my normal pacifist, conflict-avoiding self.
Edited by Hip, 23 July 2012 - 06:14 PM.