I took 2, and I'm not sure how much you've researched it, but let me just say that the first week on MT2 I was a walking hard-on. All day long, man, fatties were giving me hard-ons and it was reallllly annoying. At the gym, I'd have to go sit in the locker room until they went away. I could NOT run or do cardio because even the slightest friction would set it off. I am so glad that side effect went away.