Many dental offices offer whitening products and services. How does the dentist whiten your teeth? Often, the dentist uses professional bleaching products made of hydrogen peroxide or Carbamide peroxide, which breaks down and causes oxygen to get into your teeth’s enamel. Some dentists use the aid of a laser or light, which is supposed to activate the bleaching chemical, and therefore speed up the whitening process.

In today’s world where you can buy just about anything online, you can purchase teeth-whitening kits for at-home use that are designed to mimic the dentist’s teeth-whitening process. These home whitening kits typically contain a teeth bleaching product, a light that’s supposed to speed up the bleaching product’s activity, and a mouth guard that molds to your teeth. Some kits also contain extra items like remineralization gels to reduce teeth sensitivity or vitamin E gels to help reduce gum sensitivity.

Not all teeth-whitening kits are created equally though, and some work better than others. We’ve gathered some of the best teeth whitening kits that you can have shipped right to your door.

Note: This guide only discusses the effectiveness of teeth-whitening kits, and not the safety of any specific teeth-whitening products. Discuss the safety of at-home teeth-whitening products with your dentist if you have concerns.

AuraGlow’s whitening kit combines a peroxide whitening agent and an accelerator light. The whitening gel is 35 percent Carbamide peroxide, and the kit contains two 5-ml syringes of it.

The mouthpiece can attach to the accelerator light for easier use, and you get a storage tray for when you’re not using the product. While this kit works incredibly well, the mouthpiece is one-size-fits-all, as opposed to one you mold to your teeth. You also don’t get as much gel as you do with some of the other kits.

Made with organic peroxide, the whitening gel in this kit works exceptionally well. But, what really takes this kit a step above some of the others is the included trays. The comfort fit, thermo-form trays are BPA free, 100 percent silicone, and they contain ventilation holes so you can breathe through your mouth while you whiten.

You also get three trays, which is an added bonus, and you can attach the mouth tray to the accelerator. Each treatment takes between 10 and 30 minutes, and you see results pretty quickly.

Smile Direct Club, a company that provides at-home teeth-straightening solutions, also offers a teeth-whitening kit. The kit, which works rather effectively, contains nine peroxide whitening pens you paint on your teeth. The company advertises that the pens contain the “same enamel-safe whitening agent used by dentists.” The whitening pens work well, and they have a mint flavor, so they don’t taste too bad. The bleach also doesn’t seem to cause as much sensitivity as some of the other gels.

In addition to the whitening pens, the kit also includes a 20-LED accelerator that’s designed to speed up whitening. It does work quickly too. You can use the kit for just five minute in the morning and five minutes at night.

Glo Brilliant uses its patented Guided Light Optics (G.L.O.) technology an effort to whiten teeth faster. G.L.O. involves using a combination of warmth and blue LED light. You only have to wear the mouthpiece for eight minutes per use, and most people say they see some type of results after their first use.

In the kit, you get the GLO mouthpiece, case, control and lanyard, a power adapter, and universal USB cable. You also get peroxide whitening vials (40 applications), lip treatment, a storage and travel case, and instruction manuals.