Underbrush Gum at a Glance

The ingredients and product claims above come from Nathan & Sons' current product page.

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What Is Underbrush Gum?

Underbrush is a chewing gum product made by Nathan & Sons. Unlike traditional supermarket gum, Underbrush is designed around ingredients that the company says are intended to support oral health. The formula contains xylitol and erythritol as sweeteners and uses a combination of chicle, mastic and spruce gum as the gum base. It also contains hydroxyapatite, calcium carbonate, calcium bentonite clay, magnesium carbonate and zinc gluconate. The product is available in several flavors, including Mastic Mint, Berry, Cinna-Mastic and Tropic Twist.

Nathan & Sons also emphasizes what Underbrush doesn't contain. The company states that the gum has no gluten, sugar, aspartame or sucralose and promotes it as containing zero plastics and PFAS. This gives Underbrush a very different positioning from conventional chewing gum. Instead of simply being something to chew after a meal, the product is designed to appeal to people who care about the ingredients in their oral-care products.

Is Nathan & Sons a Legit Company?

Yes, Nathan & Sons is a real company, and Underbrush is an established product sold through the brand's official online store. One of the easiest ways to get confused about Underbrush is the existence of counterfeit and copycat products online. There have been reports from consumers who purchased products advertised as Underbrush from third-party sellers and later believed they received counterfeit products. That makes the purchasing source particularly important. If you're interested in trying Underbrush, buying directly from Nathan & Sons or an officially authorized sales channel is considerably safer than purchasing a suspiciously cheap version from an unknown online seller. Nathan & Sons' official product page currently shows more than 15,000 customer reviews with an overall displayed rating of approximately 4.77 out of 5. That doesn't independently prove that every health claim about the product is correct, but it does provide evidence that Underbrush is an established product with a substantial customer base.

What Makes Underbrush Different From Regular Gum?

The biggest difference is the ingredient philosophy. Most conventional chewing gum is primarily designed around flavor, sweetness, texture and a long-lasting chewing experience. Underbrush is positioned more as an oral-care product that happens to be chewing gum. Its formula includes natural gum bases such as chicle, mastic and spruce, along with xylitol and erythritol. It also contains hydroxyapatite and several mineral ingredients. The company specifically markets Underbrush around supporting enamel and freshening breath while avoiding several ingredients commonly associated with conventional gum.

Whether those differences matter to you depends on what you expect from chewing gum. If you simply want something inexpensive with a strong, long-lasting artificial flavor, Underbrush may not be what you're looking for. If you care more about ingredients and want a gum that fits into an oral-care routine, it becomes considerably more interesting.

Underbrush Gum Ingredients

Ingredients are arguably the most important part of an Underbrush review. The current official product page lists:

• Xylitol: A sugar alcohol commonly used in sugar-free chewing gum.
• Erythritol: Another sugar alcohol used as a sweetener.
• Chicle gum base: A natural gum base derived from the sap of certain trees.
• Mastic gum: A plant resin traditionally associated with oral and digestive uses.
• Spruce gum: Another natural resin used as part of the gum base.
• Acacia gum: A plant-derived gum used in various food products.
• Myrrh gum: A resin included in the formula.
• Hydroxyapatite: A calcium-phosphate mineral associated with tooth enamel and commonly used in some modern oral-care products.
• Calcium carbonate and magnesium carbonate: Mineral ingredients included in the formulation.
• Zinc gluconate: A zinc compound commonly used in oral-care formulations.

The product also contains flavoring and a terpene blend. The combination is clearly different from a conventional mass-market chewing gum formula. However, there's an important distinction worth making. The presence of an ingredient with research behind it doesn't automatically mean that the finished product has been clinically proven to deliver every benefit associated with that ingredient. That distinction matters particularly when discussing remineralization.

Does Underbrush Gum Really Remineralize Teeth?

This is probably the most important question in the entire review. Hydroxyapatite is a mineral closely related to the mineral structure found in teeth and has been studied as an ingredient in oral-care products. Underbrush includes hydroxyapatite in its formula, which is one reason Nathan & Sons describes the product as remineralizing gum. However, consumers should distinguish between evidence about an ingredient and clinical evidence about a finished product. A study involving hydroxyapatite in one formulation doesn't automatically establish that Underbrush itself has been clinically demonstrated to remineralize teeth to a particular degree.

The official Underbrush page presents the product as supporting enamel and oral health, but the product should still be viewed as a supplement to a normal oral-care routine rather than a replacement for brushing, flossing or professional dental treatment. In other words, don't buy Underbrush expecting chewing gum to repair an established cavity. If you have tooth pain, significant sensitivity or suspected decay, a dentist is the appropriate person to evaluate the problem.

What Does Underbrush Gum Taste Like?

Taste is one area where customer feedback becomes particularly useful. Underbrush has a more distinctive flavor and texture than the average supermarket chewing gum. Several reviews on the official product page praise the natural taste and firm texture, while some customers specifically mention that the flavor doesn't last as long as conventional gum. That's not necessarily a flaw. It depends on what you expect.

Traditional chewing gum is often engineered to maintain a strong flavor for a long time. Underbrush is built around a different formula, and the experience can feel more natural and substantially firmer at first. Some customers describe the pieces as firm when they first start chewing and say they soften after a short period. If you're used to very soft, intensely flavored commercial gum, there may be an adjustment period.

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What Do Customers Say About Underbrush Gum?

Customer feedback is generally positive on Nathan & Sons' own product page. The current product page displays a rating of roughly 4.77 out of 5 from more than 15,000 reviews. Positive comments commonly mention the natural ingredient profile, clean feeling in the mouth, firm texture and the perception that their teeth feel cleaner or stronger after chewing. Some customers also specifically praise the variety of flavors. At the same time, not every review is completely positive.

The most noticeable recurring criticism is that the flavor can disappear relatively quickly. Some customers also mention that the gum feels unusually firm when they first put it in their mouth. Those comments are useful because they highlight something you should know before buying. Underbrush isn't simply conventional chewing gum with a different label. Its texture and flavor experience are part of what makes the product different.

Underbrush Gum Flavors

Nathan & Sons currently offers several Underbrush flavors.

• Mastic Mint is the most traditional option and is likely the easiest starting point if you normally prefer mint gum.
• Berry offers a fruitier profile.
• Cinna-Mastic combines a cinnamon-style flavor with the distinctive resin-based formula.
• Tropic Twist provides a more tropical flavor profile.

The company also offers variety options, which can make sense if you're unsure which flavor you'll prefer. If you're purchasing for the first time, a variety pack can be a practical way to determine whether the texture and flavor profile work for you before committing to one flavor.

How Long Does Underbrush Gum Last?

Nathan & Sons recommends chewing Underbrush after meals and says users can chew it for around 30 minutes. Actual chewing time will vary from person to person. The important point is that Underbrush is intended to be used as part of a routine rather than treated like a quick piece of breath-freshening gum. For someone who enjoys chewing gum after meals, this could fit naturally into an existing routine. For someone who dislikes chewing gum for extended periods, the experience may be less appealing.

Is Underbrush Gum Sugar-Free?

Yes. Nathan & Sons states that Underbrush contains no sugar and uses xylitol and erythritol as sweeteners. The company also states that the product contains no aspartame or sucralose. This is one of the reasons Underbrush may appeal to consumers trying to avoid conventional sugary chewing gum. However, sugar-free doesn't automatically mean that every person will have the same experience. Sugar alcohols can affect some people's digestive systems when consumed in larger amounts. As with any food product, paying attention to your own tolerance is sensible.

Is Underbrush Gum Plastic-Free?

Nathan & Sons specifically markets Underbrush as containing zero plastics and says the gum avoids ingredients such as polyvinyl acetate and other materials associated with conventional synthetic gum bases. Instead, the company uses chicle, mastic and spruce gum as the primary gum-base ingredients. This is an important selling point for people who are specifically trying to reduce their exposure to synthetic ingredients in everyday products. It is also one of the clearest differences between Underbrush and many conventional chewing gums.

Is Underbrush Gum Safe?

Underbrush is sold as a food and oral-care product, and Nathan & Sons provides an ingredient list on its product page. However, “safe” is not the same thing as “appropriate for everyone.” People can have individual sensitivities or allergies to ingredients, and anyone with specific dietary or medical concerns should review the full ingredient list before using the product. It's also worth remembering that chewing gum doesn't replace normal dental hygiene. Underbrush should be considered an addition to an oral-care routine, not a substitute for brushing, flossing, dental cleaning or treatment when needed.

How Much Does Underbrush Gum Cost?

Nathan & Sons currently lists Underbrush as a premium chewing gum product, with pricing varying according to flavor, quantity and whether you choose a subscription option. The company currently promotes subscription savings on its store, while individual product pricing can change with promotions. That puts Underbrush above the price of many ordinary chewing gums. Whether that premium is worthwhile depends on what you're buying it for. If you're simply looking for inexpensive chewing gum, Underbrush probably won't be the obvious choice. If you're specifically looking for a natural gum base, xylitol, hydroxyapatite and a plastic-free formulation, the comparison becomes different. You're paying for the formulation and positioning rather than simply for the chewing-gum experience.

What Is Nathan & Sons' Return Policy?

This is an important detail that buyers should know before placing an order. Nathan & Sons currently offers a 30-day return window for eligible non-consumable products. However, its refund policy explicitly states that consumable products, including all chewing gum flavors, are final sale. That means you shouldn't purchase Underbrush expecting to open the package, try it and then return it if you don't like the flavor. The policy makes a distinction between consumable products and eligible non-consumable items such as certain accessories. For a first purchase, this is another reason a smaller quantity or variety option may make more sense than immediately buying a large supply.

Is Underbrush Gum Worth It?

Whether Underbrush is worth the price comes down to what you want from chewing gum. If your main priority is low cost and a strong, long-lasting conventional flavor, there are plenty of cheaper options. Underbrush becomes more compelling if you specifically want a gum made with a natural gum base and ingredients such as xylitol and hydroxyapatite while avoiding sugar, aspartame, sucralose and synthetic plastic-based gum ingredients. The customer response is also encouraging, with the official product page currently showing thousands of reviews and a rating around 4.77 out of 5. The main compromises appear to be price, the firmer texture and the relatively short flavor duration mentioned by some customers. Those aren't necessarily dealbreakers. They simply mean Underbrush is aimed at a different type of gum buyer.

Underbrush Gum Pros and Cons

What We Like

Underbrush has a genuinely different ingredient profile from conventional chewing gum. The use of chicle, mastic and spruce gum gives it a distinctive natural-gum positioning, while xylitol and hydroxyapatite make it relevant to consumers interested in oral-care-focused chewing gum. The brand also provides a full ingredient list and offers several flavors, which makes the product easier to evaluate before purchasing. Customer feedback on the official site is another positive point. Thousands of customers have left reviews, and the current displayed rating is approximately 4.77 out of 5.

What Could Be Better

The biggest issue for some buyers is the flavor duration. Several customer reviews mention that the flavor fades relatively quickly. Others mention that the gum is firm when first chewed. The price is another consideration because Underbrush costs substantially more than ordinary supermarket gum. Finally, the product's oral-health positioning needs to be interpreted realistically. Ingredients such as hydroxyapatite have relevant research behind them, but that doesn't mean the finished Underbrush formula has been clinically proven to produce every benefit implied by the broader remineralization category.

Is Underbrush Gum Legit or a Scam?

Based on the available information, Underbrush is a legitimate product from Nathan & Sons. The company has an established official website, publishes the product's ingredient list, sells the product directly, and has accumulated a substantial number of customer reviews. The bigger concern is counterfeit and copycat products. There are reports online from people who believe they purchased fake versions of Underbrush from unofficial sellers. Some consumers have specifically warned about suspicious third-party listings and products that appeared to imitate the Nathan & Sons branding. So if you're asking, “Is Underbrush Gum legit?”, the answer is yes—but make sure you're actually buying the genuine product. The safest approach is to purchase through Nathan & Sons' official website or a clearly authorized retailer rather than an unknown seller offering a dramatically different price.

Is Underbrush Gum Actually Good for Your Teeth?

This requires a little nuance. Underbrush contains ingredients that are relevant to oral health, including xylitol and hydroxyapatite. Nathan & Sons markets the product around enamel support, fresher breath and oral wellness. But chewing Underbrush should not be viewed as a replacement for brushing twice daily, cleaning between the teeth, regular dental examinations or professional treatment. It is better to think of the product as an oral-care-oriented chewing gum rather than a dental treatment. If you enjoy chewing gum and want to choose a product with a more deliberate ingredient profile, that distinction may be enough to make Underbrush attractive. If you're hoping to treat an existing cavity or dental disease with gum alone, that's not a realistic expectation.

Final Verdict: Is Underbrush Gum Legit?

So, is Underbrush Gum legit?
Yes. Nathan & Sons is selling a real product with a clearly disclosed ingredient list, a substantial volume of customer feedback and a distinct formulation that sets it apart from conventional chewing gum. The product is particularly interesting if you want to move away from conventional synthetic gum bases and prefer ingredients such as xylitol, chicle, mastic, spruce gum and hydroxyapatite. The biggest reasons to think twice are the premium price, firmer texture and reports from some customers that the flavor doesn't last as long as conventional gum.

There is also an important distinction between ingredient-level evidence and clinical evidence on the finished product. Underbrush contains ingredients associated with oral-care research, but that shouldn't be interpreted as proof that chewing Underbrush can replace conventional dental care or treat established dental problems. Overall, Underbrush makes the most sense for someone who already enjoys chewing gum and wants a product with a more natural, oral-care-focused formulation. If that describes you, Underbrush is certainly worth investigating. Just make sure you're buying the authentic product from Nathan & Sons or an authorized seller, especially given the reports of counterfeit products appearing through unofficial channels.

Frequently Asked Questions

Is Underbrush Gum legit?
Yes. Underbrush is a genuine chewing-gum product made and sold by Nathan & Sons. The official product page provides the ingredient list and currently displays more than 15,000 customer reviews.

Who makes Underbrush Gum?
Underbrush is made by Nathan & Sons. The product is sold through the company's official website under the name Underbrush Remineralizing Gum.

Does Underbrush Gum contain sugar?
No. Nathan & Sons states that Underbrush contains no sugar and uses xylitol and erythritol as sweeteners.

Does Underbrush Gum contain plastic?
Nathan & Sons markets Underbrush as a plastic-free gum and states that it contains zero plastics and PFAS. The company uses chicle, mastic and spruce gum as its gum-base ingredients.

Does Underbrush Gum contain hydroxyapatite?
Yes. Hydroxyapatite is included in the current Underbrush ingredient list.

How long should you chew Underbrush Gum?
Nathan & Sons recommends chewing the gum after meals and says users can chew it for approximately 30 minutes.

Does Underbrush Gum replace brushing your teeth?
No. Even if you choose to use Underbrush, it should be considered an addition to your oral-care routine rather than a replacement for brushing, cleaning between your teeth or professional dental care.

Can you return Underbrush Gum?
Nathan & Sons' current refund policy states that chewing gum is a consumable product and is final sale. The 30-day return policy applies to eligible non-consumable products rather than opened or consumable gum.

Why does Underbrush Gum cost more than regular gum?
Underbrush uses a different formulation and is positioned as a premium oral-care-focused gum. It uses ingredients including xylitol, erythritol, chicle, mastic, spruce gum and hydroxyapatite rather than a conventional mass-market gum formulation.

Where should I buy Underbrush Gum?
Buying directly from Nathan & Sons' official store is the safest option. There are reports of counterfeit or copycat Underbrush products being sold through unofficial channels, so buyers should be cautious with unknown sellers.

Final Thoughts

Underbrush isn't trying to be ordinary chewing gum. Nathan & Sons has built the product around a natural gum base, sugar-free sweeteners and ingredients associated with oral care. The result is a product that will appeal more to ingredient-conscious consumers than someone simply looking for the cheapest gum available. The customer response is also notable, with the official store currently displaying a large number of reviews and a rating of approximately 4.77 out of 5. Just keep expectations realistic. Underbrush can be an interesting addition to a dental-care routine, but chewing gum isn't a replacement for proper oral hygiene or professional dental treatment. If you're comfortable with the premium price and firmer chewing experience, and you like the ingredient philosophy behind the product, Underbrush Gum is a legitimate product worth considering.

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