I'm currently narural at 21 years of age. Been training off and on my whole life and I would say consistently and seriously training for about 3 and a half years. Arms are currently 15.5 inches at 8% bodyfat(16.5" when bulking) How old were you, how long had you been training and how big were your arms when you took your first dose? I only ask for arm size because I think it's a decent indicator of progress.