it works, but think about it...
This product is effective at whitening. However, I did have tooth sensitivity when I tried using it more than once a day. So I did some research. The European Union's equivalent of the FDA says, "The use of toothpastes, mouth rinses and tooth whiteners containing up to 0.1% hydrogen peroxide does not pose a risk to the health of the consumer. Toothpastes and mouth rinses should not contain more than 0.1% hydrogen peroxide." Arm & Hammer does NOT state how much hydrogen peroxide is in this product, so I wrote and asked them. They replied that: "The percentage of Hydrogen peroxide is proprietary." I wrote back and said I was concerned about safety. I only wanted to know whether the amount was less than 0.1%, not the specific amount. They never answered. I still use it occasionally, but I would not feel safe using it often.
Rating: 3 stars