This ingredient is effective against extrinsic (outside) stains on a tooth caused by such things as coffee, tea, soda, and smoking.
If a toothpaste designed for regular use advertises "stain removal" it is utilizing this ingredient. There is no risk of sensitivity.
On the other hand, products for "whitening", or "bleaching" that are only used for a few days contain a type of oxidizing chemical. A side effect can be sensitivity. Opalescence is an example.
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