For some reason I feel like this product ruined my teeth. Perhaps even made them yellower. Luckily, I stumbled upon Supersmile (a brand that actually has consumer-benefit in mind) Check it out if you want whiter, healthier teeth: www.supersmile.com I use their ergonomic toothbrush as well as their electric toothbrush. They're both effective. Also, while I'm at work or traveling, I like to take some of their Quikee products along with me...this way I can be sure to always always always keep my teeth white. Can't believe how much money and time I've spent on products like Brite Smile. read full review »