The results are immediate and it only takes 30 minutes. As the owner I was looking for a product that gave patients results without making their teeth sensitive and we found it. This is the first teeth whitening product my ultra-sensitive teeth tolerated with bright white results. The Nuyu formulation is PH balanced and contains no citric acid making it unique and tolerated by the the most sensitive teeth. Please call 214-827-4200 to schedule your appointment.