Most importantly, they’re effective and the value can’t be beaten. The kit includes seven to 10 treatments depending on the version you buy. When we cycled through the entire kit, our teeth got six shades whiter—which was a welcome surprise in just a week. Best of all, the results are said to last upwards of six months. Our 2-in-1 Whitening Kit includes the dynamic duo of transparent and flexible teeth whitening strips (that are coated with a highly effective whitening gel) plus a special Whitening Pen for touch ups. Containing safe levels of key ingredient hydrogen peroxide, this professional-grade combo can deliver teeth that are immediately up to an astonishing 6 shades lighter. To use the strips, simply apply to upper and lower teeth and leave on for just 30 minutes, as the formulation rapidly removes stains and delivers you a whiter, brighter smile. During our test, we didn't love that they feel a bit slimy as they dissolve, but we were incredibly impressed by the results—we noticed a brightening effect after each session and appreciated the convenience factor they provided. Knowing this, we took a few extra seconds with each application to ensure they were snugly adhered to our teeth. As a result, after seven days of consecutive use, we noticed that our teeth had shifted a full four shades whiter. And considering we tested these strips on a self-proclaimed coffee addict, that’s saying something! But more than half of the whiteners we tested contained far too much hydrogen peroxide and you could be putting your health at risk by using them.

From a comfort stance, these strips fit easily over teeth and stay in place once on. While it’s apparent that you have a film over your teeth, we found the strips to be smooth and comfortable while wearing.Other ingredients such as sodium bicarbonate, sodium perborate, activated charcoal or even coconut oil offer a more natural alternative, although these are usually considered less effective, as they mainly only remove surface stains.

But it’s not all about teeth whitening. There has also been a lot of concern in dental circles about the possible negative effects of using whitening products on the teeth. A major worry is that teeth whitening toothpastes may be too abrasive – potentially damaging or degrading the healthy enamel that protects the tooth. You get whiter teeth but damage your teeth in the process. What’s more each kit is free from microbeads, parabens, lactose, gluten or animal products so you can enjoy a conscience-free teeth whitening experience. Out of all the over-the-counter teeth-whitening methods, Girard believes that whitening strips are the most effective and safe.Generally speaking, Rubinshtein says that the best teeth whitening strips are those specifically designed to hug the teeth. “The strips that work better have the least amount of extra space,” he says. “Avoid using strips that don’t contour to your teeth, they won’t get the job done properly.” It’s Worth Noting: The bottom strips aren’t fitted quite as well, which may lead to gum irritation. If you’re looking for a teeth-whitening treatment that works well on the go, consider the Moon Oral Care Dissolving Whitening Strips. These fan-favorite teeth whitening strips come in the form of slim rectangles that can be comfortably folded over the top and bottom rows of teeth. The very best part about these strips is that once on, they immediately get to work and start dissolving in the process, so there’s no clean-up at the end of treatment. The only downside, though, is that while dissolving, the strips become a bit slimy, which may be uncomfortable for some (though, never painful or sensitive). We are also proud to be part of just 10% of offices who use the newest and most effective method of in-office teeth whitening called, "Opalescence Boost." More info here