Shots of celebs using at-home, light-based whitening kits are blowing up all over Instagram. And it's no surprise since your smile is one of the first things that other people notice. But with so many companies targeting the huge followings that back these celebrities, we decided to dig a little deeper to find out if the bleaching tools were really worth the hype and if their claims of whiter, brighter, teeth were true.
A lot of the 'light' accelerated systems on the Internet do not do anything."

In order for stains to be lifted from the surface of teeth there are key additives that must be included in gels. It is scientifically proven that the added light does nothing without the photocatalytic ingredient
Photo-what? A photo-catalyst is a substance that triggers a chemical reaction. In order to get a better understanding of exactly what this means, "Without a photo-catalyst such as ferrous gluconate [found in professional dental treatments like Philips Zoom], zinc oxide, or titanium dioxide, the light does nothing."

So, while shopping for the best stain removers, double check to see if they include one of the photo-catalysts in their elixirs.READ MORE HERE
http://dentalchannel.com.ng/2018/03/23/teeth-whitening-5-basic-things-know/