Brand: Nathan and Sons
Type: Sugar-free, Aspartame-free
Sweeteners Used: Xylitol & Erythritol
Dietary Compliance: Vegan, Non-GMO, Diabetic-friendly, Keto-friendly, Gluten-free
Gum Base: Comprises of Mastic, Spruce and Chicle Gum
Flavor Source: Natural
Rating: 7.7/10
I first stumbled upon Underbrush Remineralizing Gum while scrolling through TikTok and was instantly intrigued. Created by Nathan and Sons, this gum is marketed as a plastic-free, remineralizing option that promises a more natural chewing experience. With compelling branding and an admirable mission, I decided to give it a try and see if it lived up to the hype.
Packaging
When my order arrived, I was pleased with the speedy delivery and thoughtful packaging. The gum comes in fully recyclable, plastic-free cardboard boxes that align perfectly with the brand’s eco-conscious message. Its earthy design gives off a natural and premium feel. The packaging prominently features the phrase “Remineralizing Gum” and includes a clear list of ingredients, along with notable claims such as “Plastic-Free,” “No Synthetic Rubbers,” and “Non-GMO.”
While these affirm the product’s identity and values, broader brand missions—such as transparency, sustainability, and oral health innovation—are more thoroughly expanded upon on their official website, rather than the packaging itself.
Inside, I found a personalized handwritten letter, which added a warm, human touch that made the experience feel memorable. The gum is housed in a paper container, and while the packaging is compact and pocket-friendly, I found the box slightly tricky to open and reseal. Also worth noting: if exposed to heat, the gum can melt and stick to the packaging. One reviewer even mentioned receiving a box where the gum had turned into a solid block. A quick heads-up if you live in a warmer climate or tend to leave things in your car.
Still, the attention to ingredient clarity and minimal waste is commendable. The gum’s origin—handcrafted in the U.S. with ingredients like mastic from Greece and spruce from North America and Germany—adds another layer of authenticity and care.
Quantity and Size
I ordered the 8-pack bundle, which included a total of 144 pieces, with each box containing 18 hand-cut pieces. The pieces themselves are small and slightly irregular, owing to their handcrafted nature. Their light beige-brown color adds to the rustic charm. While each box is promoted as a one-week supply, I found myself doubling up due to the small size of the individual pieces.
It’s worth mentioning that the pieces are uncoated and unwrapped, which may feel unusual if you’re used to traditional pellet gum. But it aligns with the zero-waste, no-frills packaging aesthetic.
Interestingly, the size variance—even within one pack—reinforces the idea that this isn’t a mass-produced product. And I kind of like that. Still, a slightly larger or more uniform option might enhance the chewing experience for those accustomed to conventional gum sizing.
Ingredients
This is where Underbrush truly shines. It boasts a clean, functional formula that includes:
You can find the complete list of ingredients below:
- Organic Xylitol
- Organic Erythritol
- Gum Base (Chicle, Mastic, and Spruce Gum)
- Myrrh Gum
- Acacia Gum
- Nano Hydroxyapatite
- Calcium Bentonite Clay
- Organic Eggshell Powder
- Organic Terpene Blend
- Natural & Organic Flavors
Each ingredient serves a purpose. For instance, xylitol and erythritol are low-calorie sweeteners with dental benefits. Nano hydroxyapatite helps remineralize teeth, while mastic and myrrh gums have natural antibacterial properties. The blend of tree saps makes the gum biodegradable and completely free of synthetic rubbers and plastics.
Additionally, the gum is dairy-free, nut-free, soy-free, gluten-free, and made with non-GMO ingredients. The brand proudly avoids artificial preservatives, colorants, synthetic sweeteners like sucralose and aspartame, and common allergens. I love how transparent the brand is about what they don’t include—no synthetic rubbers, no artificial dyes, no preservatives, no corn syrup, and no talc. They even highlight the use of wild-foraged ingredients—a nice bonus for eco-conscious buyers.
Caloric Content
The nutritional label on the side of the box offers helpful clarity: each serving is 1.4 grams, with 14 servings per box. Both total calories and carbohydrates are listed as zero. For those watching their macros, blood sugar, or calorie intake, this gum is virtually guilt-free. It’s a great option for low-carb, keto, or diabetic-friendly lifestyles.
Flavor Choices
Underbrush currently offers three flavors: Mint (Mastic Mint), Cinnamon (Cinna Mastic), and a newer Berry variant. I tried the Mint and the Berry.
The Mint was refreshing, clean, and slightly herbal—not overpowering like commercial gums but more balanced and natural. The mastic gives it a gentle piney note, and the spearmint essential oils round it off nicely.
The Berry surprised me. It’s a medley of raspberries, blackberries, and strawberries, delivering a mild fruity taste that felt pleasant without being artificial. I haven’t tried the Cinnamon yet, but if it’s anything like the others, I expect it will lean warm and subtly spiced, rather than bold and burning.
Texture and Consistency
The texture is another standout feature. It starts off a bit firm but quickly softens into a consistent, elastic chew. Thanks to the chicle base, it retains its shape for extended chewing sessions. Unlike many synthetic gums, Underbrush doesn’t become slimy or mushy.
Some users reported crumbliness or stickiness to dental work, but I haven’t experienced any of that. Still, I wouldn’t recommend it if you have braces or recent dental work—better safe than sorry. And yes, this gum might not blow bubbles—but it’s not meant to.
Chewing Experience
Overall, I found chewing Underbrush quite enjoyable. The initial burst of flavor doesn’t last very long—something to keep in mind if you’re used to intense, artificial flavors. However, the gum remains satisfying due to its texture and subtle residual taste.
It produces more saliva, which I found helpful for dry mouth and oral cleanliness. It’s almost like a natural tooth polish on the go. And although the chew is a bit more of a jaw workout than regular gum, I actually like that—it makes me more mindful.
Bonus: no weird chemical aftertaste and no stomach upset, which I sometimes get with other xylitol gums. But a small warning: those with IBS or very sensitive digestion might want to ease into it.
Flavor Longevity
The flavors are more subtle and fade faster than commercial gums—usually within a minute or two. That said, some mild notes linger, and the gum never turns bitter or unpleasant. It’s a trade-off for the clean ingredients and lack of artificial flavor boosters.
I’d love to see them experiment with layered or delayed-release flavors in the future. But even in its current form, it does the job of freshening breath and making my mouth feel clean.
Environmental Impact
Underbrush deserves high marks here. The gum is 100% biodegradable and plastic-free, made from natural tree saps. Even the packaging is compostable and recyclable. The gum doesn’t contain any synthetic rubber or plastic polymers, so there’s no microplastic pollution.
Even better, many ingredients are wild foraged or sustainably sourced, like the chicle from South America and mastic from Greece. The packaging doesn’t include tamper-evident features, but given its simplicity and small-batch feel, I didn’t mind.
It would be great to see the brand go even further in terms of carbon footprint transparency, but as a product, it’s already leaps ahead of conventional gum in terms of eco-friendliness.
Price and Value
Let’s talk numbers. At about $64 for an 8-pack (144 pieces), this gum is not cheap. Depending on how often you chew, the cost-per-piece can feel steep—it’s about four times more expensive than typical grocery-store gums.
However, there are options to save through bulk purchases and a 10% discount via their Subscribe & Save model. Plus, they offer a 100% money-back guarantee, which shows confidence in their product. They even run occasional sales on their official website.
Is it expensive? Yes. But is it overpriced for what it offers? I don’t think so. You’re paying for premium ingredients, handcrafting, and sustainable packaging. For me, it’s worth the occasional indulgence.
Overall Rating
In conclusion, Underbrush Chewing Gum delivers on many of its promises. It combines a clean ingredient profile, effective oral health benefits, and admirable eco-conscious packaging. Yes, it’s pricey, and the flavor doesn’t linger as long as some might prefer, but for anyone prioritizing natural wellness and sustainability, this gum stands out.
A few caveats: due to xylitol, it may have laxative effects if consumed in large amounts, and it’s toxic to dogs—so pet owners should be cautious. Still, these are standard considerations for most sugar-free gums.
Would I buy it again? Yes—especially as a gift or a personal treat. Underbrush isn’t just a gum; it’s part of a lifestyle choice for better health and a cleaner planet. And that’s a mission I can chew on.
Pieces are now even smaller, having adopted a standardized shape that effectively cuts all the corners off of what used to be “hand cut” cubes. Money money money. Enshittification. Shrinkflation. This product is doing it, now. For a dude that’s kinda fringy about the government, flouride, etc… it’s sad that he is doing the same thing everyone else is doing, now. What happened to bucking the system? LOL. Money changes a person, doesn’t it?
And the ingredients list has grown considerably, now they are adhering to federal laws regarding putting nutrition facts on packaging. Order it now and tell us what you think. It’s sad to see them cut corners (literally) to make more money. Even smaller… smh.
Thanks John. I enjoy the gum, but I likely will not buy it again. Too small. Flavor dies in less than a minute. And then reading your comment turns me off even more.
Also, remineralizing? Why/how? Because you’re chewing something containing minerals shared with teeth? Ridiculous. Snake oil makes hair grow, trust me, bro. And showing people making the gum by hand in the TikTok commercials when they are obviously factory made in China. I berate myself for falling for this. The pieces are 2/3 the size in the picture above. If I had chewed such a stiff, flavorless piece of gum before seeing these clever commercials, I would have thrown the pack away, but I paid big bucks for this stuff. LOL. Whoever came up with this is brilliant and unprincipled.
All due respect john, I think you bought a counterfeit. The standardized size is likely due to a more efficient cutting process because theyve gone viral, it dosent mean that its made in China.
The ingredients list has also remained exactly the same as the blogger describes.
Boxes say “Made in China” on the back.
You got a counterfit one. The OGs do not have “Made in China”
Yeah the box/packaging for the gum was made from China
I was going to order it because it sounded really good on TikTok and the description was really good but after I read your comments, I felt annoyed that they are making it smaller so I decided not to order it.
I ended up swallowing mine because it dissolved in my mouth. Is it supposed to do that?
Mine did as well. I thought okay, let me try another piece. It is very hard. The flavor is not bad, strong at first but, let’s see what happens to the second piece.
Same thing. That’s what brought me here. Just got the packages today. Seems like they are totally dried out. They’re mottled with splotchy discoloration and do not look like gum or anything chewable.
Mine are also hard as rock! Not “chewing” gum consistency at all!
Exactly my issue! More like a soft mint than chewing gum.
No, does not dissolve. You can literally chew it for hours if your jaws can take it. I believe you got a counterfit one.
Mine also dissolved in my mouth as I was chewing it. It did the same for my husband. Didn’t even turn to gum. I’m a little disappointed.
Same here, smaller than expected brittle pieces in all three packages I received. All dissolved immediately. Not a gum. Also Made in China. Major disappointment!
Hard as a rock. Can’t chew it !!
I’ve noticed counterfeit versions of this gum being sold widely, even on Walmart’s website. To ensure authenticity, make sure you purchase the original directly from the official website or the Amazon store of the manufacturer mentioned above.
Total garbage. This isn’t gum; it’s a gritty throat lozenge. All these new ‘super gums’ from every manufacturer are literally just a scam. I don’t trust a single word about what’s actually in them.
Bought some and liked the mint flavor. However, the hard cubes dissolved completely in about 3-4 chews—no chewing gum whatsoever! Unfortunately, I wouldn’t recommend it.
Is this gum supposed to be made in China?
I am seeing many people disappointed in the comments. There are a lot of fake sellers out there trying to pass themselves off as the legit thing. I’m wondering if some of these other people got one of those instead of the real thing. I agree about the taste dying relatively early, however the texture and size is great. Not any smaller than gum you would get at the grocery store. My gum also did not ever dissolve. It has held up for hours. I find it pretty good. Make sure you don’t purchase a knockoff. Only order from their actual website. They don’t sell at walmart or amazon. None of those are legit.
They do sell on Amazon, but make sure it’s the Nathan and Sons Store. It’s made in California—not in China!
This isn’t gum. It dissolves after just three chews, with no gumminess or ability to continue chewing. Even when using two pieces at a time, it completely disappears. I would not recommend it.
Not the real product, see my other comment.
I just bought a 2-pack deal DIRECT FROM THE COMPANY WEBSITE after seeing all the scammers and imitators on TikTok and the problems people are having with them. Was a little bit disappointed with size of the piece’s vs the price but inflation has everything looking expensive. I bought the Cinna Mastic flavor and it was good while it lasted (pretty quick) but the literature that was sent with it warns you of this (natural flavorings not chemical). Packaging was cute, a little tough to get it opened. Only time will tell if it really whitens my teeth, heals my gums and cavities (I’ve got some of those) and snatches my jaw (not really worried about that one). Right now, I’m on the fence for a repeat order.
Looks like most people commenting negatively are buying the scam version of this gum. It HAS to be ordered from Nathan and Sons from California, the only producers of the gum. Anything that dissolved in the mouth is not the real thing and it sucks that they got scammed. I’ve been chewing mine for 2 hours now.
For all who are wrongly commenting, “This is not gum, it doesn’t chew, it dissolves, etc…” You are clearly buying a knockoff version off of something else, or some other person’s TikTok. The actual Nathan & Sons gum isn’t made in China, it’s all still handcrafted at their facility which isn’t large. They run out very often because of how small their operation is and is why so many Knockoffs sprouted up to take advantage of the high price and gum in general. Also, the packs aren’t $50, I paid $25 every time I’ve gotten it, and $10 in shipping. The pieces aren’t that small, they’re pretty much regular gum size. Not sure why no one can fact check something before they spend their money, but you have it wrong. Don’t go commenting bad about something when you clearly haven’t even had the real gum. 8/10 for me, fantastic, healthy, and 100% transparent with the new nutrition facts not including nearly anything more than what was originally mentioned.
All of you guys commenting are falling for counterfeits. The ones I ordered are exactly as the blogger here describes, and doesn’t “dissolve” or have a “huge list of ingredients”
I have to say I like it. I ordered from their website. It is expensive compared to main-stream gum. But I mean, look, if you buy organic, your cost goes up as well. That’s we are dealing with. It was really hard at first. And the flavor was there (I got the cinnamon) for probably 15 minutes and then it was gone…there were some after bursts of flavor tho. I like the consistency. Reminded me of those wax lips we used to get as kids, but not as hard as those. I admit, I am a gun chewer for 5 minutes and on to the next piece. But with this I didn’t feel the need to throw it out. And my teeth didn’t feel grimy. Overall, I give it 8.5/10.
Many of these comments are not the actual product. There are many Chinese knockoffs that are using Nathan & Sons pictures and videos as their own on TikTok, Instagram, Walmart. They do not sell on any of these places, and they are the only makers of underbrush. You can buy it on their site, tryunderbrush.com. The actual product is great and doesn’t dissolve like these Chinese knockoffs that are literally just mint sugar cubes.
It isn’t gum. Hard as a rock. Tried chewing it and it crumbled. Tried several pieces with the same results. Seems like just a scam.
You gotta keep chewing on one side of your mouth before it can be switched freely between side of your mouth it says so in the packaging if you had a thought you would have looked for something like that instead of popping one in your mouth while being super skeptical
Mine took over 2 months to arrive. They told me they would refund me if it wasn’t delivered by Dec 3rd. I received it on Jan 10th. It was a gift for someone for Christmas so I have no need for it now. They claim its not from China, but the shipping packaging was covered in Chinese labels. These guys are a joke and I wouldn’t waste your time or money.
Bought it from the actual site. I went the 4-pack of mastic mint. I do tend to chew 2 pieces of trident/other gums at a time so I took 3 here and that’s comparable I’d say to the same effect. Overall good flavor and fun to chew. Where I find the big name brands lose its chew/flavor after 20 or so minutes this doesn’t and the initial flavor lingers around plus the subtleties. Yes the price is expensive per piece (I think for the 4 pack it came out to $0.44 per piece compared to a trident which is around $0.15 – 0.20 a piece) but I do think it’s worth it for a better potentially healthier chew.
DO NOT BUY THIS – NANO PARTICLES ARE HORRIBLE FOR YOUR HEALTH. They are proven to move to all body areas and specifically the lungs and can cross the brain/blood barrier.
Eggshell isn’t vegan.
Nathan & Sons expose the knock off’s here on Instagram.
https://www.instagram.com/reel/DFG7JzRSk_l/
I like them
If it says ‘Made in China’, it’s a scam. This product is made in the USA by Nathan and Sons only.