I really don't know if DHT makes you look younger.
Something sure is that it's been 6 month I am on finasteride, and I never had so many people telling me how older I look now. People give me 25-26 yo (I am 24) whereas 1 year ago I looked barely 20.
I usually take it easy but I became worried about that recently and the last time a friend made me notice that I looked much older now than before, I decided to ask him, "What makes you think that?"
Even though at the moment I thought my question was stupid, since I was sure he would have pointed my thinned hair, to my surprise he actually said "Your skin".
"You mean, my hair?" "no, your skin".
Then, back home I looked at the mirror, and since I always overlooked my skin health in favor of my hair, I realized he was right. Skin is probably even more important than hair as far as looking young is concerned. I really have the feeling that finasteride worsened my skin, making me look older.