Ingredients

The GLO Science teeth whitening gel contains a 6% hydrogen peroxide solution. Hydrogen peroxide is one of the most common and effective ingredients for whitening teeth, though it can cause some temporary tooth sensitivity. GLO Science stands out as one of the only teeth whitening companies to list all of their ingredients, which are vegan and gluten-free. While most teeth whitening gels are similar, this type of transparency is refreshing. Customers can review all of the components of the GLO Science system and decide whether the product is right for them.

The kit also includes a one-size-fits-all warming mouthpiece which you wear during each treatment to accelerate the whitening process. The GLO Science device operates self-timed 8 minute sessions and turns itself off when the 8 minutes are completed. GLO teeth whitening devices are the only ones on the market to incorporate heat acceleration.

Effectiveness

Reviews of the GLO Science teeth whitening kit are largely positive, with most users saying they had noticeably whiter teeth after a few days of use. Though hydrogen peroxide can cause tooth and gum sensitivity, GLO Science reports that its formula is specially-formulated for users with sensitive teeth. GLO System recommends that customers use the device for no more than 14 consecutive days. To maintain your whiter teeth, the company suggests re-treatment one day a month and repeating the full, multi-day sequence of treatments every four to six months. As with any whitening system, customers should exercise common sense and discontinue use of the product until the sensitivity subsides.

The GLO Science system is not ADA-approved, but few at-home whitening kits are. Their product is FDA-registered, according to the company website, and it's vegan as well as gluten-, latex-, and cruelty-free.

Ease of Use

GLO Science is as easy to use as most other teeth whitening systems, though the manufacturer suggests that you apply the gel directly to your teeth first, then place the tray in your mouth. That's the reverse of many other systems, but the company recommends this method to ensure even coverage. GLO System's gel is thicker and less runny than some competitive products.

Pricing

The GLO Science teeth whitening kit is a little more expensive than some of its competitors, but it's probably worth the investment for those who are serious about whitening their teeth by several shades and are interested in maintaining their new, whiter smiles through periodic re-treatment. The equipment is sturdy and will last for some years. If you cannot afford to purchase the kit all at once, you can pay in installments when you purchase through the company's website.

GLO System's newest kit is Blue-tooth enabled and connects to a mobile app that helps you track your treatment. The kit includes 7 vials of teeth whitening gel, which is enough for 42 applications, or 14 days of treatment. It also includes a convenient travel pouch and a soothing Vitamin E and antioxidant lip treatment. You can purchase refills in packs of three, five, seven, or ten vials. Refill vials are a little more expensive than comparable products, but you can get a better deal if you purchase in bulk. The company reports that refills can also be used without the device for touch ups.

The company also offers a 30 day money-back guarantee and a 1-year limited warranty on all device components. GLO Science also offers free shipping on its website.