Nope. I did before T, though. I had pretty good hair growth on my upper lip and chin before I ever went on T, so when I went full-time, I used Just for Men to accentuate that hair, since it was really light. After about 3-4 weeks on T, the hair started coming in like mad, and all of it was brown... except, like I said, my mustache, which started out brown but ended up blonde within a few months.
SD