I have a son that is 12 he has good teeth and no cavities, however his teeth are a little yellow looking. The dentist said they could whiten them with no problem. The real problem with that is I just can not afford to have them done by a dentist. If it was a cavities or something I would have it fixed, but I can not see spending 100 plus for a whiten treatment. I started to look at the over the counter whiting strips, they do not say that you can not use for a 12 year old. So just wondering if any one knows if it is ok to try.