
Studies underline that carbamide peroxide in teeth whitening does not cause any cancer in mouth
Some people worry that teeth whiteners can cause cancer. The peroxide that is used to bleach your teeth contain free radicals, which might cause cellular damage.
However, recent studies underline that at-home teeth whitening solutions have a low risk to produce any form cancer.
The hydrogen peroxide that is used by those whitening systems has a very low concentration (about 3%). Studies underline that this concentration is not harmful.
If you are using approved whitening kits there is only a low contact to your tissues. Therefore the risk to expose yourself to free radicals is slim .
A compound that has been found in saliva is an effective defense against peroxide and can neutralize 30mg of peroxide in 1 minute. In comparison, one teeth whitening strip has no more than 4 mg of peroxide.
Other studies show that every person is exposed to 99,99% more peroxide every day than what you will find in one strip.
Conclusion: There is no risk.

Whitening Strips Should Cover Your Teeth Completely
Well it’s not rocket-science to apply your teeth whitening strips, but there are some things you should consider before applying your strips:
1. Brush your teeth for a bit longer than your normally would, make sure they are very very clean
2. Remove the Upper strip from the package (carefully) and apply the gooey side to your upper teeth. Make sure the whitening strips are covering your teeth completely.Repeat the step for the lower teeth.
3. Use your toothbrush to flatten the strips so that they have very close contact to your teeth!
4. Clean your hands carefully.
5. Wait for 30 minutes.
6. Remove the whitening strips carefully and brush your teeth again.

Women applying her teeth whitening strips
What can teeth whitening strips do for me?
Teeth Whitening Strips are thin strips made of plastic; on the inner side of the strips there is a thin film of hydrogen peroxide that is bleaching your teeth. In contrary to other teeth whitening systems and solutions the strips can be used directly, you don’t have buy another product to fill them with a bleaching substance.
The strips have to be in close contact to the teeth in order to get the best results. To make it really easy there are usually two different shapes of strips, one for the ipper teeth and one of the lower teeth.
How long do I have to wear those teeth whitening strips?
Usually you have to wear them for 30 minutes, twice times a day. It might depend on the number of strips inside your teeth whitening kit. Some companies apply a higher concentration to the strips, either 6% hydrogen peroxide or 10% hydrogen peroxide.
Strips with 6% are worn for 14 days (56 strips), Strips with 10% for 7 days (28 strips).
Why are teeth whitening strips better than other teeth whitening systems?
Those strips have been designed for use at home. They are easy to use and deliever fast results. Other teeth whitening systems are not intended for the use at home.
Also speaking will be a lot easier using strips instead of bulky trays. Another plus is that fewer people will notice your whitening strips.