I was 15 when I started wearing it and I suffered no ill-effects of it and I am now 41.
Kids who are younger than 13 have NO BUSINESS wearing eye shadow, blush, all that crap, lip gloss and light mascara yes. They are little girls, they are not 20-something business women. Parents need to stop making kids grow up so fast, that is what is soooooo wrong in society today.