Welcome to Ask Doctor Zac, a weekly column from news.com.au. This week, Dr Zac Turner explains how lip balm could be damaging your lips. QUESTION: Hey Dr Zac, I’m addicted to my lip balm.

fill my lips in with that shade and then put some lip balm over the top. It’s been hailed as a “make-up must-have” and is “packed with a powerful mix of natural ingredients that lock in ...