tooth or false: is hydrogen peroxide safe for teeth?


connie gregson

by connie gregson, friendly head of r+d at hello products


here at hello, we’re big advocates for being educated on the ingredients that you’re putting into your mouth: where they come from, how they’re made, and what they do. if you’re thinking about using hydrogen peroxide on your teeth, here’s how it works and what you should keep in mind.

is it safe to use for whitening?

Generally speaking, tooth whitening products that use hydrogen peroxide as an active ingredient are safe to use – and higher concentration formulas will provide a whitening effect. However, it’s worth mentioning that some people may experience tooth sensitivity from using hydrogen peroxide whiteners and that repeated use and frequency of use can cause some issues. So for example: if you’re regularly using whitening strips, toothpaste, and mouthwash that all contain hydrogen peroxide, you may be more likely to deal with sensitivity. To help you determine whether it’s the right choice for you, here’s a look at how hydrogen peroxide works in comparison to other whitening options.

extrinsic vs. intrinsic tooth stains

Tooth stains fall into two basic categories. The first is “extrinsic” stains – these are stains that are present on the outer, external surface of your teeth and can be caused by smoking, foods and beverages and other environmental factors. The second is “intrinsic” stains which — you guessed it — are stains located inside the teeth themselves and can be chalked up to factors like genetics and age (lucky you), but also environmental factors,foods and beverages can impact them.

how does hydrogen peroxide whiten teeth?

Hydrogen peroxide works by addressing intrinsic stains. When used in toothpaste, strip or mouthwash form and applied to teeth, it generates a bleaching effect that changes the chemical composition of a stain molecule within the tooth, causing it to become lighter in colour. Level of whitening results depend on the method of application, duration of usage, and strength of the hydrogen peroxide concentration.

what are whitening alternatives to hydrogen peroxide?

While hydrogen peroxide relies on a chemical reaction to lighten the internal structure of teeth, alternative whitening options address extrinsic stains instead. Using abrasive ingredients, extrinsic whiteners gently polish away stains on the surfaces of teeth. When we say abrasive, we’re not talking *sandpaper* abrasive though – extrinsic whiteners possess the requisite roughness to remove surface stains, but when used properly are safe for your teeth and won’t harm their enamel.

our tooth cents

If you have any further questions about hydrogen peroxide, we recommend reaching out to your dentist. While you may ultimately decide that hydrogen peroxide is the right choice for you (we believe in a brusher’s right to choose), we’ve made the decision to not use chemical whiteners in hello products. Instead, our whitening toothpastes - use natural ingredients like hydrated silica and limestone to effectively address surface stains. We source these ingredients thoughtfully and are meticulous in making sure that they provide an effective-but-not-too-aggressive level of abrasiveness. And did we mention that in addition to being gentle whiteners we also think our products taste great and are pretty fun to use? Well we sure think so, and we think you will, too! Try hello and start smiling wider (and brighter) today.