http://thebeautybrains.com/2006/10/15/how-old-do-you-have-to-be-to-use-acne-treatments/ Cosmetic chemists answer your beauty product questions! We are a group of cosmetic scientists who understand what the chemicals used in cosmetics really do, how products are tested, and what all the advertising means. Fri, 30 Jul 2010 13:13:20 +0000 hourly 1 http://wordpress.org/?v=3.0