Better to use natural methods. Drink juice through straw, only 1 or 2 cups of coffee/tea a day. Drink water after meals and chew "orbit" gum. Clean teeth twice a day with a good whitening tooth paste. Having it done pro makes teeth look unnatural (check out some tv/film stars), can be expensive and could even damage the teeth.
I had my teeth whitened last June, you can go as white as you want so it does not look unnatural. I had mine done at the dentist it cost me £250. It's called Evolution ice made by Enlighten Labs. You have a mould of your teeth made and have to put this substance in and sleep with it on for 14 days - but if your teeth are sensitive it might be difficult - some people can't do it. When I had finished my 14 days my teeth were very bright but they do tone down - and you use it every couple of months to keep them pearly white. See you dentist and he will advise. Good luck.
I`ve had my teeth laser whitened. I had it done abroad so it was a lot cheaper. My teeth went 5 shades lighter. It will only lighten them to your natural shade. The brilliant white teeth you see on tv presenters/film stars are veneers, not laser whitened teeth. The dentist made me a mould and I bought a peroxide gel which you use yourself to maintain the results. The percentage of peroxide gel you get in the UK for maintenance isn`t as high as the stuff you can get from the internet. I`ve been a bit lax about maintenance but a friend of mine commented recently that my teeth looked white and it was about 18 months ago I had it done (I drink red wine and tea as well)
Yes, I forgot to say the whiter your teeth are to begin with the lighter they go - mine were quite white before - my dentist was very pleased with the result and wanted me to sit in reception and advertise ! His receptionist tried to have hers done but was unable because she was allergic to the bleach and got as very sore mouth.
Ooh let me know how you get on. My teeth are going very dark as I can't clean them properly due to braces - I'm dreaming of a hollywood smile when these bu**ers come off LOL