
My teeth have never been super white, not even when I was little. I drank coffee every day for 35 years and it affected my teeth. I have used this product about 5 times with my Philips electric toothbrush. The first two uses. I haven't seen much improvement. On the 3rd application I noticed a difference. Tonight was my 5th application and my teeth are definitely whiter. In fact, they're the whitest since I was a teenager. I'm not sure how abrasive this material is. So I won't be using it forever. I plan to use it daily, maybe for another week. Then I leave it alone until I need it again. By the way: I used quite a bit of this product every time I brushed my teeth. I charged the brush 3 or 4 times every time I brushed. So I've already used about 1/4 of the tube. But it works.
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