It clearly depends on each person, but I cannot say that after one month I saw significant changes down there. It clearly has changed my "output" if You know what I mean, but otherwise, I tend to get horny at times, but it is more controllable than used to be. But at the same time I would not say that my libido has diminished greatly... However, given how enormous my libido used to be (and I have to admit that it was sometimes really annoying), any subtle changes to that would not be that much noticeable. It is like taking one glass of water from a bath full of water...