and what would you consider old? 
What was that saying in the 60s? Don't trust anyone over 30? Hah, if that's the case then I would be old too.
While I think 30s, 40s and 50s are a grey area, it's pretty clear that someone in their 20s is "young" and someone in their 60s is "older." I would be willing to bet money to dollars that a 22 year old guy would kill for such a pill. A 61 year old who has been shaving for 15 years probably wouldn't care about "looking older."
I'm not so sure. I'm 23 and I don't need the pill. A 61 year old might, because when you go bald at 50 or such, you might think: "Now I am really old. My good old life is over" (Or something). To me, I cannot relate my baldness with elderness (growing old) because it started at age 17. So I won't take the pill, because I do not consider my baldness as a flaw. When I would take the pill, my time consuming old "friend" called vanity will return, but I don't need it back in my life