I saw that Crest whitening stripes have sodium hydroxide as an ingredient. It's the same ingredient which is used for toilet bowl cleaning. Isn't this harmful for the teeth? I looked at the Kroger whitening stripes package. There is no sodium hydroxide. Crest is worse and more expensive, Kroger is better and cheaper. Did anybody notice this difference? Who tried Kroger whitening stripes? When my braces will be removed I finally can try it. Do the whitening stripes work?
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I hope you mean 'strips' rather than stripes. No Krogers in my part of the country but I'm assuming the reference is to any so-called 'store brands' so I'll look for Kroger rival in this western locale. Thanks for the tip.
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