We worked hard to develop a product that whitens teeth six shades in 10 days if used as directed! However, results can vary depending on the individual and the type of discoloration. If you have a pre-existing condition like tetracycline stains, discolored teeth from birth (hereditary), or dental fluorosis, the product may not be as effective. For the best teeth whitening, follow the instructions carefully, and use it for 10 minutes a day for 10 consecutive days.
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