Skincare-savvy 13-year-old Martha educates herself on the best products via social media.
Martha is part of a trend where even 8-year-olds are interested in adult skincare.
Skincare guru Caroline Hirons applauds informed choices by teens like Martha.
Hirons advises parents to assertively decline inappropriate skincare requests from their children.
British Association for Dermatologists cautions against potential harm from adult skincare ingredients for young users.