Whiter teeth give a younger appearance and actually can reduce bacteria and improve the gums. While it may make teeth sensitive, it is only temporary and there are several techniques/products that can reduce that issue. Whitening works best on clean teeth, so see your hygienist first. In office whitening is a good jump start but don't get caught paying more than $ 300 for that procedure, unless they provide a cleaning as well. A slower, but very reasonable priced technique is the paint on or brush on whiteners. Our office offers Klox brand.