Results may vary. Even we get tired of hearing that. Truth is, each tooth is different, as are your personal preferences; what you eat, how often you use Britenz and how much you’re wishing to whiten your teeth. You should notice a slight improvement with each use. With most people, we suggest using the product 2-3x per day for 10-14 days to achieve the results they are seeking. Britenz will not whiten caps, fillings, bridges, dentures veneers and crowns.