As the two previous people stated, it will lighten your teeth if used regularly. However if you're looking to get the fake white teeth sported by the movie stars, celebreties, and models, you will have to have your teeth capped or veneered. Those fake white teeth you see in movies and ads are just that, FAKE. Unless you were born with extremely white teeth (some people are, BUT FEW) that have yellowed with age or from drinking colas, coffee, tea, or smoking, the lightening kits will help to remove surface stains. But they will not whiten your teeth lighter then their original shade. So if you are looking for a fake white smile, it will cost you thousands of dollars and some pain. If you don't want to go with caps or veneers, you can now invest in Lumineers, which are not permanent and are only worn for special ocassions, not meant to be worn continuously. They too are very expensive, around $3,000 dollars. But if you are just looking to lift surface stains any of the tooth whitening jells on the market will work. Frankly they are all about the same for whitening ability, the only difference is the price. If you do decide to use a whitening jell, DO NOT over use, as they can damage the enamel on your teeth and cause problems with your gums. Many people are under the impression that if you use it 2 to 3 times as often it will whiten faster and better. It won't, it will just end up destroying your teeth and gums. And making your teeth so sensitive you won't be able to eat or drink anything without pain.
Tooth whitening jells are nothing more than peroxide in a supension jell to hold it on. A little will help and won't hurt, alot will cause nothing but pain.
