Sets your gums on fire
I'm sure it does it job as a whitener, but I couldn't stand to keep it in my mouth longer than a few seconds. I don't know if I'm allergic or just have sensitive gums but I felt like someone lit my mouth on fire! It was worse than a tooth ache! I have very healthy teeth and gums so it came as a surprise and I am not hesitant of the quick and easy teeth whiteness because of this. It works for some, but definitely not for me.
Never again !
Where do I start.... The claim is you will see the difference after a week, so after a week of putting this vile stuff in my mouth twice every day gagging from the vile taste every time and enduring the burning of my gums I saw absolutely no difference. This product is not worth the time, money and definitely not the hassle !