It took 5-6 weeks before it “kicked in” for me. Your missus will notice before you do (my new g/f did…as you’ll smell different for a week or two; or maybe just me!).
Do make sure that the vial is filled fully…that caught me out a few times at the start where it looked full but wasn’t. Once you think you have enough, draw all the way back to clear any bubbles and then push up until a small bit drips out.
I’m now growing facial hair at a stupid rate and getting chest hair at 40. Pretty bloody stupid, but…anyways! My face gets really oily, so charcoal wash morning/night is a must.
Other than that…I just feel eh “normal”. Sexually everything works as intended, energy wise it’s normal and gym wise, definitely sped up muscle creation / increased appetite.
Not sure there’s any “big bang”, which I was also expecting: it’s just that your body just begins working as intended!