Underbrush Gum counterfeits can closely resemble the original product, so buyers should verify the website, seller and packaging before placing an order.
Direct answer: Nathan & Sons has publicly warned buyers about Underbrush-style copies and sellers using similar packaging or marketing. Independent retail reporting has also covered the dispute. However, packaging color, product texture, price or shipping origin cannot prove that a product is counterfeit by themselves.[1][2]
The safest approach is to begin at the official Nathan & Sons website and verify the seller, payment merchant and package information before using the gum.
Quick Underbrush Authenticity Checklist
Check these five details before buying or chewing the product.
- Start from nathanandsons.com.
- Check the exact marketplace “Sold by” name.
- Confirm that the checkout merchant matches the advertised seller.
- Check whether the box clearly identifies Nathan & Sons.
- Stop using the product if the seller, merchant and package information conflict.
What Counts as a Counterfeit Underbrush Product?
A counterfeit product is presented as genuine Nathan & Sons Underbrush even though it was not made or authorized by the brand.
Similar products do not all fall into the same category:
- Counterfeit: A product falsely presented as genuine Nathan & Sons Underbrush.
- Lookalike or copycat: A product using similar packaging, wording or advertising but displaying another company name.
- Unauthorized seller: A seller not confirmed by Nathan & Sons as an approved sales channel. This does not automatically prove that the product is fake.
- Competing product: A separate brand selling a similar type of gum under its own identity.
Nathan & Sons publishes photographs of products and sellers it says imitate Underbrush. These are company allegations unless a separate court, regulator or independent investigation confirms an individual case.[1]
Where Should You Buy Authentic Underbrush Gum?
The simplest option is to start from a website Nathan & Sons identifies as its own.
Nathan & Sons’ terms identify these websites as operated by Nathan & Sons LLC and its affiliates:[3]
- nathanandsons.com
- tryunderbrush.com
The company has also referred to Amazon, TikTok Shop and Etsy purchasing channels in its own content. Marketplace sellers and URLs can change, so open marketplace listings through the current links provided by Nathan & Sons instead of searching by product name alone.[4]
Important: A marketplace can be legitimate while an individual third-party seller is not authorized. Always check who is actually fulfilling the order.
Check current Underbrush product and seller details
Start from the Nathan & Sons product page instead of an unfamiliar advertisement or marketplace result.
View the Nathan & Sons Product PageFor taste, ingredients, chewing texture, price and overall value, read our separate Nathan & Sons Underbrush Gum review. Those product-review topics are intentionally not repeated here.
How Can You Check an Underbrush Seller and Package?
Use several checks together because copied packaging can still look convincing.
-
Check the Complete Website Address
Read the domain carefully before entering payment information. Nathan & Sons has listed websites using added words, missing letters and similar spellings as possible lookalikes.[1]
- Do not rely only on the website logo.
- Do not assume a sponsored search result is authorized.
- Do not treat HTTPS or a padlock icon as proof of legitimacy.
- Open the official domain independently when uncertain.
-
Confirm the Actual Marketplace Seller
Check the exact “Sold by,” merchant or storefront name. Product images and reviews may remain attached to a listing even when another seller handles the order.
Also review:
- The seller’s business information.
- The return policy and return address.
- Whether reviews apply to the same seller and product variation.
- Whether the listing was reached through an official Nathan & Sons link.
-
Check the Brand Identity on the Box
Modern Retail reported that Nathan & Sons treats its five-tree design, wording and green packaging as part of its brand presentation.[2]
Because those design elements can be copied, check whether:
- The package clearly identifies Nathan & Sons.
- Another brand name appears near the word “Underbrush.”
- The product or flavor name contains spelling errors.
- The box differs materially from the current official product page.
-
Compare the Merchant and Manufacturer Information
A different manufacturer, distributor or fulfillment company does not automatically prove that a product is fake. Legitimate brands may use third-party business partners.
The concern becomes stronger when the advertisement, checkout merchant, package brand and manufacturer identify unrelated businesses.
One BBB Scam Tracker report described Underbrush-style boxes carrying different brand and manufacturer names. The report reflects one consumer’s account; BBB did not laboratory-test the product or issue a legal ruling.[6]
-
Save Barcodes and Batch Codes, but Do Not Trust Them Alone
A copied package may contain a professional-looking barcode or batch code. Record the details, if present, and ask Nathan & Sons whether they match its records.
A code may help an investigation, but it does not independently prove authenticity.
-
Do Not Authenticate the Product by Chewing It
Some consumers have described suspected copies as unusually hard, crumbly or candy-like. However, Nathan & Sons also describes genuine Underbrush as firmer than conventional gum.[1][8]
Texture can be a reason to stop and investigate, but it cannot confirm who manufactured the product.
Which Warning Signs Matter Most?
Mismatched seller and business information matters more than price, texture or shipping origin alone.
| Warning sign | What it may mean | What to do |
|---|---|---|
| Another brand name appears on an Underbrush-style box. | The product identity may not match the original advertisement. | Stop using it and ask Nathan & Sons to review the package. |
| The advertisement and checkout domain show different businesses. | The advertisement may have redirected you to an unrelated seller. | Save screenshots and verify the merchant before paying. |
| The payment merchant, seller and package names do not match. | Several identity mismatches create a stronger concern. | Request verification and consider opening a payment dispute. |
| The marketplace seller name is unclear or unrelated. | The listing may not be fulfilled by Nathan & Sons. | Open the marketplace through the brand’s official website. |
| The gum is firm, inexpensive or shipped internationally. | These details do not prove fraud by themselves. | Check the seller, merchant and package identity instead. |
What Should You Do If You Receive Suspicious Underbrush Gum?
Stop using the product, save the order evidence and contact the seller, brand and payment provider promptly.
- Stop using the product. Keep the remaining gum, box and shipping materials.
- Save evidence. Photograph the advertisement, website, receipt, tracking information, shipping label and all sides of the package.
- Contact Nathan & Sons. The company may recognize a known seller or lookalike design, although photographs may not prove the product’s ingredients.[1]
- Request a refund. Use the marketplace’s official dispute system rather than relying only on messages with the seller.
- Contact the payment provider. The FTC recommends asking the bank, card issuer or payment app whether the transaction can be reversed.[9]
- Report fraud or a safety concern. Report deceptive advertising to the FTC and food quality or reaction concerns to the FDA.[9][10]
Get medical help when needed: Call 911 for severe symptoms such as trouble breathing, collapse, seizure or inability to awaken. For a possible poisoning in the United States, contact Poison Control at 1-800-222-1222 or use webPOISONCONTROL. Contact a healthcare professional about an adverse reaction.[11][12]
What Evidence Supports the Underbrush Copycat Concern?
The concern is supported by company warnings, independent reporting, a public trademark record and unverified consumer reports.
- Company information: Nathan & Sons publishes images, domains and seller names it says imitate Underbrush.[1]
- Independent reporting: Modern Retail covered the dispute and reported founder Nate Mal’s estimate that more than 800 knockoff brands had appeared. The number was not independently audited.[2]
- Public legal record: A USPTO Trademark Trial and Appeal Board docket shows that a Nathan & Sons trademark opposition was sustained in March 2026. The record concerns one proceeding and does not determine the status of every online seller.[5]
- Consumer reports: BBB Scam Tracker and Reddit users have described packages and orders involving different seller or manufacturer identities. These reports are anecdotal and were not independently verified.[6][8]
This article does not reproduce a permanent blacklist because seller accounts and domains can change. Check the live Nathan & Sons warning page for the company’s latest list.[1]
Final Verdict
The safest way to avoid an Underbrush lookalike is to begin at the official Nathan & Sons website and verify the exact seller before paying.
A firm texture, low price, copied barcode or international shipment cannot prove that a product is fake. The strongest concern is a combination of mismatched seller, merchant, package and manufacturer information.
If a received product does not match the advertisement, stop using it, preserve the evidence and contact Nathan & Sons, the marketplace and your payment provider.
Frequently Asked Questions
1. What is the official Underbrush Gum website?
Nathan & Sons identifies nathanandsons.com and tryunderbrush.com as company-operated websites. Check the spelling carefully before entering payment information.[3]
2. How can I tell whether an Underbrush seller is authorized?
Open the seller or marketplace listing through Nathan & Sons’ official website whenever possible. Then confirm the exact “Sold by” name, payment merchant, return information and package identity.
3. Is every Underbrush listing on Amazon fake?
No. Nathan & Sons has referred to an official Amazon sales channel. The concern is that other marketplace sellers may use similar photos or wording. Do not choose a listing based only on the product image.[4]
4. Can a barcode or batch code prove that Underbrush Gum is authentic?
No. Barcodes, lot numbers and packaging artwork can be copied. Record the code and ask Nathan & Sons whether it matches its records, but use seller and transaction information as well.
5. Does an unauthorized seller necessarily sell fake gum?
No. An unauthorized seller may carry genuine, diverted, expired, poorly stored or imitation products. “Unauthorized” describes the seller’s relationship with the brand; it does not authenticate the individual package.
6. What should I do if I already chewed suspicious gum?
Stop using the remaining product and keep the packaging. Contact a healthcare professional if you experience a reaction. In the United States, call 911 for severe symptoms or Poison Control at 1-800-222-1222 for a possible poisoning concern.[11][12]
Research Note
This guide reviewed Nathan & Sons’ official pages, independent retail reporting, a public USPTO docket, government consumer guidance and selected consumer reports involving seller or package-identity mismatches.
Consumer reports were used only as examples. PromoLatte did not purchase, authenticate or laboratory-test the products discussed.
Sources
- Nathan & Sons: Underbrush Scams and Knock-Offs . Official company warnings and allegations.
- Modern Retail: How TikTok-Viral Gum Underbrush Fights Knockoffs .
- Nathan & Sons: Terms of Service .
- Nathan & Sons: Underbrush vs. Crait Hydroxyapatite Gum Comparison . Official company content referencing purchasing channels.
- United States Patent and Trademark Office: Trademark Trial and Appeal Board Proceeding No. 91303041 .
- Better Business Bureau Scam Tracker: Forrest Folk Consumer Report . Consumer-submitted report; not a legal finding.
- Reddit, r/Scams: Scam: Counterfeit Underbrush MIMT Gum . Anecdotal consumer report.
- Federal Trade Commission: What to Do if You Were Scammed .
- U.S. Food and Drug Administration: Report a Problem to the FDA .
- Poison Control: Poison Control Help and FAQs .
- U.S. Food and Drug Administration: FDA Consumer Complaint System and MedWatch .
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