Okay, are your teeth yellow or discolored, is that what you are saying? Beyond that you are giving us the impression that your teeth are roting like brown edges and the sort. If it is the latter, there is not much you can do. You have to go to the dentist. If they are yellow etc you can buy a toothpast with whitener or one of those Colgate white strips (be careful people have problems with sensitivity, you can counter act with Sensodyne) Also, I really don't know of your financial situation but dentistry schools offer their services really cheap. Many times there are dentist that offer services for very little. Ask a social worker in a community center, those people know everything! Oh, by the way this tooth paste has the strongest kind of floride, it that can actually repair minor tooth damage. "Sensodyne Repair". I can't remember if it is also whitening. Good luck!