I recently started to supplement Zinc and Mag but i cannot tell if my test levels have risen at all yet. i guess the only way to tell would be to get my blood tests done again. I have supplemented tribulus terrestris before and i know it worked becuase after the first week because i started to break out on my shoulders. 1 positive of tribulus was that i overall felt alot better about myself and had positive mood changes. Those mood changes being a result of higher testosterone levels........so i hear.