I’m not 100% of the exact amount of time, but guessing I would say maybe a year and half. Again, I had a ton of issues when on it. Now looking back on it I became full blown hypogonadal when I quit, then it pretty much stayed the same when I went back on it.
I am far from perfect now, but I am a ton better than I was more than a year ago. Still trying to get my sex drive back and normal functioning in this department.