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A member asked:
Is it normal for listerine to turn my mouth blue?
2 doctors weighed in across 2 answers
Yes: You are probably using listerine agent cool blue for kids which has a blue disclosing dye and tints your teeth blue. This was formulated by design to act as a disclosing solution to stain plaque blue but it doesn't work very well. The idea was to stain everything so you could clean it off.
Answered 1/29/2013
5.3k views
No: Listerine usually does not have the effect of turning your mouth blue.
Answered 2/9/2013
5.3k views
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