I'm 29...I've had basal cell and MOHS surgery....and have had two dysplastic nevi removed. My mom had melanoma twice and beat it and has had scc and bcc numerous times. Having said that, i still was a sun freak while i was young and now am paying my dues. Anyway, I was given carac for two weeks to use nightly. I had very minimal side effects. I wanted to post that so that people were not all scared to use it. My face looked red just at my nose and cheeks..I had miminal peeling...and my doctor was very pleased with what it did. His advice..do it every five years and I'll never have that severe reaction as long as I take care of my skin. So what I guess I'm encouraging is those who are young and have had scc or bcc to see if their doctor will let them do it for a two week run and to keep up with it...it can really help us avoid future surgeries.