Trib works like hcg, not viagra. It stimulates more LH out put. Yohimbine hcl works similar to viagra. They both increase blood flow to your penis.
------------------
"That which does not kill me, will make me stronger."
*** Dont email me asking for a source!!!!! ***
"Catch a man a fish and he eats for a day, but if you teach a man to fish, he eats for a lifetime."