Question: what ingredients are in crest whitening strips?
Answer: Safety Information. This product should only be used as directed by your dentist. ... 
Ingredients. Whitestrips: Purified water, Glycerin, Hydrogen Peroxide, Carbopol 956, Sodium Hydroxide, Socium Acid Pyrophosphate, Sodium Stannate, Sodium Saccharin.
Directions. ... 
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