I believe the active ingredient used in teeth whitening gels when used in a mould on the teeth is hydrogen peroxide. I wish to know what percentage is used.

I have somewhat white teeth but they could be better. I want to know what is the best toothpaste that makes your teeth whiter. What I am using now doesn’t do much for me. It is " Crest Whitening Expressions". I have been using it for months now and nothing has changed. I brush my [...]

Is it really effective?
Is gargling it like mouth wash the best method of using it?
How often is it safe to do so?
Will it harm my teeth?

I have somewhat white teeth but they could be better. I want to know what is the best toothpaste that makes your teeth whiter. What I am using now doesn’t do much for me. It is " Crest Whitening Expressions". I have been using it for months now and nothing has changed. I brush my [...]

So I heard that you can whiten your teeth with hydrogen peroxide and to apply it about 2-3 times a day
I have school pictures in 2 weeks and my teeth aren’t very bright.
but my question is for how long should i leave it in for?
and have you tried this? if you did how did [...]

Are Teeth Whitening Procedures Dangerous?
Executive Summary teeth whitening procedures by Ashley Kennedy
Lots of people are going crazy after teeth whitening procedures just for the sake of an impressive smile and attractive looks. They are not aware of the dangers that are attached to the artificial and chemical exposure to your teeth. [...]

I have somewhat white teeth but they could be better. I want to know what is the best toothpaste that makes your teeth whiter. What I am using now doesn’t do much for me. It is " Crest Whitening Expressions". I have been using it for months now and nothing has changed. I brush my [...]

Does that actually work??? What does work for whitening your teeth besides that?