Crest Whitening Strips 10 Day Dental Whitening System is probably one of the better home whitening kits that you will find out there and does what it describes.The hydrogen peroxide formula is practically the same as what you will get at the dentist. The concentration is between 20-30% of what you would find normally at the dentist.
When using the strips please follow the instructions and only apply the strips for the recommended time, as any longer it can lead to pains like zingers or sensitivity which can be extremely painful.
However there are two things I recommend you should do before using any home whitening kits.
The first thing I would recommend is to ensure your teeth is in good health, meaning a trip to the dentist for a good clean and check up for cavities. This is important, as the bleach can cause damage and unnecessary pain to you.
Once you know your teeth are in good conditions you can begin using the teeth whitening product. Before you use the product, you should always brush and floss your teeth. As this will allow the formula to penetrate only on the stains on the surface of the teeth.
Crest Whitening Strips are definitely a cheaper and effective alternative to Zoom Teeth Whitening which I paid about 800$ for. Over at Amazon you can buy Crest Whitening Strips 10 Day Dental Whitening System for about 25$.
