acne
"Retin-A is a life-changer. I struggled with moderate acne from about age 12. I tried Differin in high school, with some minor success, but still got plenty of breakouts and my skin was dull. 

I went to the doctor and got Retin-A about 2 years ago, and it is a miracle product. My skin is beautiful. I routinely get compliments on my skin from friends and family, and can name multiple instances in which perfect strangers have told me that I have stunning skin. My skin is smooth and seems to glow. A plus is that Retin-A prevents wrinkles, so now that I'm in my twenties and preparing to see my first fine lines, I am happy to have that added benefit. 

TIP: Give this stuff 6 months to work. I almost gave up and am glad I held out."