Question: how often can you use boutique whitening?
Answer: Wearing Time: For Carbamide Peroxide Bleaching Gels: 10%, 15% or 16% strength can be used 2 to 4 hours once or twice/day. You can keep it in overnight while sleeping if you don't experience major sensitivity after initial applications. 20-22% bleaching gel: use for 30 minutes to 1 hour once or twice per day.