A few years ago when I was a fresh faced, dewy 22 year old, I was taken in by an ad for a Garner moisturiser with Vitamin C. When I got to the drugstore, the horrified sales assistant whipped it out of my hand and told me that Vitamin C thins the skin and this is why it's used in anti-aging moisturisers....thins those fine lines right out of your skin. I got a sample of Lancome Sensation Totale (Continuous C Perfecting Complex - Refines, Renews, Restores) as a gift with purchase and I'm loving it. My skin looks a lot more even after only a few uses and is far glowier (if that's a word ). But I'm worried about using something like this longterm if the original SA was right. Does anybody know anything about topical Vitamin C for the skin? I'm 25 with nary a wrinkle and don't want to make my skin worse!!