Q. Dr. Caplan, I am 57 years old and have had yellow teeth for most of my adult life. I have always had too much acid in my blood and have had to change my diet to eating almost exclusively alkaline foods to counteract this. But now I have the yellow teeth to contend with. I am a redhead and my teeth are extemely sensitive. I do not want to whiten my teeth by any of the methods offered, either at home or at my dentist, as I am concerned about zingers. I have heard some very disturbing stories of pain and discomfort from teeth whitening. So here’s my question – Can the discomfort of zingers be lessened and maybe even non-existent if I bleach them over weeks instead of days – maybe say just 5 minutes a day instead of 30? I have a low pain tolerance and would not mind bleaching over weeks or months (if it took that long) if I knew I would get the desired results. Do you know of anyone or have you heard of folks bleaching over long periods of time and getting results? Thanks for taking the time to read and answer my question.