This product works wonders! It doesnt sting or burn the mouth! I use this product daily, i use this one at night and alternate it with “colgate enamel” in the mornings. I have highly sensitive teeth due to loosing all my enamel and i have to say this has helped a lot. I can now eat ice cream and not cringe and make those around me uncomfortable. I can sometimes eat ice (which i love to do). I used to not be able to eat sweets and now cosmic brownies are my best friends. If you have highly sensitive teeth i highly recommend this product!