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Blue container of Greco Gum with yellow text and a logo on a light gray background.
Hand holding a small open tin with mastic gum nuggets, featuring benefits on a dark background: "Clean mouth, prevent bloating, sculpt jaw, avoid plastic, and more..."
Two containers of mastic gum, one droplets and one nuggets, on a stone background with the text "Same as our nuggets, but smaller and harder to chew. The perfect jaw workout."
List of beneficial constituents found in Chios mastic gum on a light gray background
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Hand holding mastic droplets with a dark background and the text "Place 5-8 droplets on your tongue, let sit for 10 seconds, start chewing."
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Close-up of hands sorting through a pile of mastic gum with text about origin: "Grown, harvested, and cleaned by hand in Chios, Greece."
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4.79 from 575 reviews
·
100K+ sold

Mastic gum droplets

Our mastic gum droplets are small and hard, which makes them a favorite for working out your jaw and facial muscles.

  • Sculpts your jawline
  • Kills bad breath
  • Calms digestion & bloating
  • 100% plastic-free
  • As low as $0.67/day
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$39.98
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Great product! Leaves your jawline sore as if you’ve just done a workout.

Blake M.Verified buyer

There are so many droplets in the container and you can chew each piece you make for days. Will last a long time.

Adam K.Verified buyer

Whole crystallized resin from the mastic tree (Pistacia lentiscus var. Chia). Nothing added.

Quality & Authenticity Report

Truestar verifies and publishes third-party test results for every harvest of Greco Gum.

All checks passed

This batch is authentic Chios mastiha. No contaminant detected above safety limits.

ReportGG-685576Lot685576Issued21 May 2026Verifybytruestar.com/GG-685576
Origin & Identity

Authentic mastiha grows only in the Mastichochoria of southern Chios, and imitation resins are common. Identity is confirmed at the species level before any batch is cleared.

DNA species testtrnL region vs. NCBI · CMGA labP. lentiscusconfirmed
Botanical identity (HPTLC)independent · RL LabsMastic gumstandard profile
Mastic acids contentmasticadienonic + iso · HPTLC> 12%meets Ph. Eur.
EU Protected Designation of Origin emblem
Protected Designation of Origin

The raw resin is “Chios Mastiha,” protected under EU law (PDO-GR-1558). It is harvested on Chios and certified by the official growers’ association. EU register →

Lot 685576 · certified by CMGA · 2026-05-21
Heavy Metals

“Not detected” means below the lab’s detection limit. For scale, a cup of brown rice holds roughly 10 µg of arsenic (FDA Total Diet Study), far above what is detectable in a serving here.

ArsenicNot detectedLOD 0.011 µg/g
CadmiumNot detectedLOD 0.022 µg/g
Lead< 0.085 µg/gbelow quantifiable level · under half the 0.2 µg/g limit
MercuryNot detectedLOD 0.005 µg/g
Tested by RL Labs · ICP-MS · 2025-09-08
Pesticides

Every lot is screened by the official growers’ association before release: a multi-residue panel of hundreds of agricultural chemicals against Ph. Eur. limits.

Multi-residue panelhundreds of compounds · GC/MS-MS & LC/MS-MSNone above0.01 mg/kg limit
DithiocarbamatesMTD. Pest 100< 0.2 mg CS₂/kgconforms
Ph. Eur. residue monographCompliant
Lot 685576 · CMGA Quality Dept. · 2026-05-21
Microbes

Independent testing to USP methods. Every count falls far below its specification limit.

Total plate count< 10 cfu/glimit 1,000 · 100× under
Yeast & mold< 10 cfu/glimit 100
E. coliNot detected
SalmonellaNot detected
Staph. aureusNot detected
EnterobacteriaNot detectedabsent in 1 g
Tested by RL Labs · USP <2021>/<2022> · 2025-09-08
Analysis performed by
Director of Microbiology
RL Labs · independent laboratory, est. 2005
Ioannis Benovias
Chemist, M.Sc
Quality Dept. · Chios Gum Mastic Growers Association
Verified & published by

Results reflect laboratory analysis of submitted samples at the time of testing, as reported by the named laboratories. RL Labs has no financial interest in the product. Truestar verifies the source documents; it does not perform the analysis. Results do not guarantee future performance or shelf life.

Our raw mastic gum droplets are harvested, cleaned, and sorted by hand. A natural, good-for-you alternative to artificial chewing gums.

A lot more than a jaw workout.

Mastic gum knocks back the bacteria behind plaque, calms inflamed gums, and promotes healthy digestion.
  • 73%*

    of oral bacteria killed in two hours.

  • 33%

    less gum inflammation in one week.

  • 77%

    report better digestion in three weeks.

*†‡: Based on clinical studies of mastic gum. Individual results may vary. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

  • Single originChios, Greece
  • One ingredientMastic resin
  • 120+ beneficialCompounds
  • Chew for hoursNever loses flavor
  • Truestar certifiedNo contaminants

Good for your mouth, gut, jaw, and more.

Mastic gum has been treasured for millennia. Its beneficial properties were known to Hippocrates in 400 BC, who recommended it for the prevention of digestive problems, colds, and bad breath.

Artificial chewing gums
Cleans teeth & freshens breath
Digestive relief & de-bloating
Hard enough to train facial muscles
Free from sugars and sweeteners
120+ naturally occurring beneficial compounds

Why Greco Gum?

Sculpts jaw

Hits all four jaw muscles: masseter, temporalis, and both pterygoids. It’s the best way to train your face.

No plastic

Ordinary chewing gum is built on a petrochemical base. Ours has one ingredient: mastic resin.

Digestive support

Mastic is antimicrobial, antibacterial, and anti-inflammatory, which is why it relieves indigestion, bloating, and other gut trouble.

Piney taste

The taste is piney and refreshing, and completely natural: no artificial flavors.

One of a kind

Chios, with its unique microclimate, is the only place in the world where mastic trees produce their healing resin.

Oral health

Mastic gum kills the bacteria behind plaque, tooth decay, and bad breath.

Most recent reviews

  • ★★★★★

    Best natural product available

    Excellent product better than I could have expected, love the flavor. Used it everyday. Already ran out!

    Verified buyer ·

  • ★★★★★

    Another Great Greco Product!

    Combine these droplets with the gum to design your perfect gum consistency, whether softer or harder or somewhere in between. Excellent and pure product. Highly recommend!

    Verified buyer ·

  • ★★★★★

    Sleeker face, safer nails, zero acid reflux

    When I opened my first tin and tried the droplets, the piney flavor was a shock to my system. I was nervous to swallow my own saliva! But I endeavored to finish what I started. Now I basically have an addiction to Greco Gum! I love the crack and crickle of it when it dries a bit, and the challenge of chew time for every tooth, even my front teeth. After a few months I noticed that my jaw was sleeker and stronger. Both at the same time! My face simply looks better, and it helped me to stop biting my nails down to the quick. I chew for hours and hours a day. My jaw gets tired, I massage, no…

    Verified buyer ·

  • ★★★★★

    Best natural gum

    It makes my teeth and jaw feel so good after. Tastes so natural, definitely will be buying again.

    Verified buyer ·

  • ★★★★★

    Great product

    High quality, just make sure to leave it under your tongue at first.

  • ★★★★★

    Great quality

    Great product, high quality, you get used to the texture after a bit but I would highly recommend leaving it under your tongue for longer at first, just let it warm up.

Hundreds of verified customer reviews.

Frequently Asked Questions