My DD is 13 years old. She is a coffee drinker and that has caused stains on her teeth. I asked her to try some natural methods to whiten them, but she is not interested as she says that it takes time to show the result. She told me some of her friends had done teeth whitening treatment from a clinic in our locality and she too want to do that. I’m just wondering if she is a candidate for that. Is it safe for a 13 year old to get teeth whitening treatment?