Tobacco products like cigarettes contain tar, which is naturally dark, and nicotine, which starts out colorless but becomes yellow once it reacts with oxygen. They leave dark and yellowish stains on your teeth, which can be difficult to remove. After extensive research and product testing, this article also underwent an intensive review process: Other kinds of teeth whitening products exist besides pens. They are available over the counter and contain hydrogen or carbamide peroxide as a whitening agent. These include: Teeth whitening pens work the same way as other whitening products, but they use a serum to apply whitening ingredients to your teeth. Most teeth whitening pens use a peroxide formulation—either hydrogen or carbamide—to break down stains. “Peroxide gels break down into water, oxygen, and reactive oxygen molecules,” explains Dr. Velayo. “These reactive oxygen molecules treat both the enamel and the dentin, oxidizing the bonds of discolored stain molecules. By changing the stained molecules, the tooth becomes lighter.”

Unwanted Food or Drink Products - Once supply conditions are broken, there are a number of factors outside of our control that can affect the quality of a product. Therefore perishable goods such as food and drink cannot be returned. Since all types of whitening products are applied differently and have varying concentrations of ingredients, it’s important to follow the manufacturer’s directions for the application included with the specific product. Carbamide peroxide releases 50% of its whitening effects in the first two hours of application. These effects can last for six more hours afterward. 1 Crest 3D White Whitestrips: We found these strips to be affordable and convenient, but they definitely made our teeth more sensitive—so much so, in fact, that we had to discontinue testing early. You can also use the PAP-X Pro White Teeth Whitening Pen whenever you feel like your teeth need a touch-up.We also spoke to experts to determine what shoppers should know about teeth whitening pens, including the results they can expect, how they work, and who teeth whitening pens are best for.

We did notice some long-term discomfort over time, though, possibly because we felt like it was pretty abrasive. That created something of a catch-22 for us in testing—when we used the toothpaste, it whitened our teeth a couple of shades, but when we stopped using the toothpaste (because of sensitivity), we noticed that our teeth began yellowing and staining again almost immediately. The product felt like we needed to use it every single day to maintain an improved and brighter teeth shade. However, it noticeably caused teeth sensitivity that discouraged us from using it every day. What’s one easy and cost-efficient way to whiten your teeth at home or on the road? Using a whitening pen. According to cosmetic dentist Dr. Brian Kantor, whitening pens are beneficial because they’re simple to use and don’t take long to apply. They’re also easy to store in your bathroom cabinet or keep with you on the go, making them arguably the most convenient whitening solution on the market. Teeth whitening pens containing hydrogen or carbamide peroxide are proven to be safe and effective. While bleaching can cause tooth sensitivity, it is unlikely to happen with a whitening pen if you follow the recommended use. 4 How Effective are Teeth Whitening Pens?On the other hand, hydrogen peroxide breaks down faster than carbamide peroxide and lightens stains in as little as 30 to 60 minutes. But it doesn’t produce much effect until the next application. 2