1 doctor weighed in:

Why are my teeth yellow again despite constant brushing two weeks after using crest 3d white strips?

1 doctor weighed in

In brief: Staining

Your teeth are yellow again because they are stained again.
Brushing alone does not whiten your teeth, and the white strips can only do so much.. the peroxide is not that strong. For a professional result, see a dentist.

In brief: Staining

Your teeth are yellow again because they are stained again.
Brushing alone does not whiten your teeth, and the white strips can only do so much.. the peroxide is not that strong. For a professional result, see a dentist.
Dr. Theodore Davantzis
Dr. Theodore Davantzis
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