I've tried 20% solutions and they sting--I feel an uncomfortable burning sensation inside my mouth.This 10% solution is fine for overnight.If I have to do it two nights in a row, fine by me.My teeth look white and beautiful.
Contrast PM PLUS - 10% Carbamide Peroxide with 3% Potassium Nitrate | Teeth Whitening Gel
I've tried 20% solutions and they sting--I feel an uncomfortable burning sensation inside my mouth.This 10% solution is fine for overnight.If I have to do it two nights in a row, fine by me.My teeth look white and beautiful.
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