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Original Nail Envy is OPI's strongest and most effective nail strengthening treatment. Whether your nails are splitting, dry, brittle, weak, or you just cannot grow them, Original Nail Envy is the treatment for you. Apply two coats to your bare nail and then apply one coat every other day to maintain your treatment.riginal Nail Envy is OPI's strongest and most effective nail strengthening treatment. Whether your nails are splitting, dry, brittle, weak, or you just cannot grow them, Original Nail Envy is the treatment for you. Apply two coats to your bare nail and then apply one coat every other day to maintain your treatment.
The other option is to use a desensitizing gel immediately after whitening your teeth (i.e. Relief ACP Oral Care Gel, UltraEZ Desensitizing Gel). A study done by Dr. Wm Browning of Medical College of GA tested the sensitivity factor of Opalescence PF 10%, NiteWhite Excel 2Z 10% and Rembrandt XtraComfort 10%.hey are a type of antibiotic-used a lot years ago, but unfortunately, still used today. They cause your teeth to discolour, and this type of staining is very hard to remove. I'm also using Opalescence, but just at a 10% strength. I'm about to try the 15% strength tonight.