I chewed a few pieces of Underbrush Remineralizing Gum over the last two weeks so you don’t have to waste money on a product that might not deliver. Below I’ll walk through what it is, what’s actually in it, how it felt to use, what the science says, and who, if anyone should try it.
What is Underbrush gum?
Underbrush is a sugar-free chewing gum positioned as a “remineralizing” gum, meaning it aims to help restore minerals to tooth enamel while you chew. The brand recommends chewing after meals to combat demineralization and support enamel repair. It’s offered in flavors like Mastic Mint, Berry, and Cinna-Mastic and is promoted as natural and plastic-free.
Ingredients
- Nano-hydroxyapatite: the same mineral that composes tooth enamel; used in some dental products to help fill microscopic enamel defects and reduce sensitivity. Its inclusion is the company’s main “remineralizing” claim.
- Xylitol / Erythritol: sugar alcohols with evidence showing they reduce caries risk by starving decay-causing bacteria and supporting a neutral oral pH.
- Natural gums and resins (chicle, mastic, spruce, myrrh, etc.): base for chewing and long chew time; many are traditional chewing materials and add texture/experience.
Those ingredients line up with what you’d expect for a gum that aims to support remineralization and oral pH. That doesn’t mean it will replace brushing or fluoride toothpaste, but it complements oral care.
My personal experience (taste, texture, effects)
- Taste: the Mastic Mint has a clean, herbal-mint note, not toothpaste-sharp, more like a long-lasting natural breath chewer. Berry and Cinna-Mastic are pleasantly mild.
- Texture & chew: cubes are firmer than mainstream commercial gums but chew down pleasantly and retain flavor for a long time. They’re made from natural saps, so the mouthfeel is different (more “classic gum” than modern rubbery gums).
- Aftertaste & breath: noticeable clean feeling after 10–20 minutes. If you’re using it after meals, it does help neutralize lingering sweetness/acid.
- Oral comfort: I didn’t experience irritation or sensitivity. If you have TMJ issues, be cautious, any gum can aggravate jaw problems.
Pros and cons
Pros
- Contains nano-hydroxyapatite and xylitol, two ingredients with plausible oral-health benefits.
- Natural gum base and longer chew time than many mass-market gums.
- Sugar-free and low calorie, safe for diabetics/sugar-watchers.
Cons
- If you have jaw problems, chewing frequently may be problematic.
- Not a replacement for fluoride toothpaste or professional dental care, don’t expect “cavity reversal” headlines to be true.
- Price is higher than mainstream gums.
Conclusion
Underbrush sells a real product with ingredients that have credible roles in oral health. The brand isn’t hiding behind fake reviews or bogus science; the claims are ambitious in tone, but the formula itself aligns with remineralization theory. Think of it as a useful supplement to a solid oral-care routine (brushing, flossing, dental visits), not a standalone cure.
Check out Horsepower Scrubber I reviewed earlier.