Hey Rush,
I went on a bottle cycle taking 3 a day, didn't seem to notice any hair loss. Bought two more bottles a month later and went on a 2 bottle cycle, increased to 6 pills a day bout half way through. Started losing hair about the same time I increased the dose. Paul Arnold stated in another post that if you are not susceptable to male pattern baldness being in your genes then you shouldn't experience any loss.
I don't have any MPB in either of my folks trees, but I was noticing a significant amount of hair loss. The loss seemed to persist for up to a week after the cycle was concluded.