How long does it take hydrogen peroxide to whiten yellow teeth when gargeling fo!


Question:

How long does it take hydrogen peroxide to whiten yellow teeth when gargeling for 2min each time?


Answers:

I recently quit smoking and started using a combination of HP and Crest Whitening Rinse. I use the rinse in the morning and at night after brushing and flossing, and then the HP at night before the rinse. In less than 2 weeks my teeth look great!


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