First of all let me tell you that it is not as bad as others in the market. The price is actually high as per the product. No doubt the product property is good but it wont last longer. The white effect takes place for 12hours max. And then it asks for more thoothpaste to make it white and shiny. Colgate’s flavor are not so bad. It gives a mint effect after the clean up. Overall health impact is good but you have to continue this thing if you want a visible white tooth daily. There is no overall benifit of this product.