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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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4.79 from 565 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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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.

Customer

I’ve tried several varieties of mastic gum and none of them come close to the quality of Greco Gum.

Ingredients
Our mastic gum droplets contain one single ingredient: crystallized resin harvested from mastic trees grown on the island of Chios, Greece.
How to use
Chew 30–60 minutes daily. Before meals to prevent bloating and aid digestion, after meals to freshen breath. Anytime to train your jaw muscles and improve focus.
Sourcing
Sourced from the latest mastic gum harvest through the official growers’ association. Pieces are chosen for their purity as well as consistency in size and hardness.

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

Build a stronger jaw.

Hard enough to work all four jaw muscles. Also cleans up your breath, fights harmful bacteria, and supports your gut.
  • 73%*

    of oral bacteria killed in two hours.

  • 15%

    thicker jaw muscles in eight weeks.

  • 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

  • ★★★★★

    Clean teeth and strong jaw 💪

    Can really feel a difference in how clean my teeth are.

    Verified buyer ·

  • ★★★★★

    A great experience all around.

    I love mixing a part of a nugget with a couple of the droplets, the consistency is perfect! I hadn't chewed gum in years because of bad ingredients and unpleasant texture, until I found Greco gum, and now its a daily habit again. I highly recommend giving it a chew, not just for the good taste and texture, but the health benefits as well!

    Verified buyer ·

  • ★★★★★

    A delicate punch!

    These tiny little “drops” pack a delicate punch. The subtle pine flavor quickly becomes a craving. I’m not a gum chewer by nature but this is hard to resist once you start. I’m glad I found Greco Gum!

    Verified buyer ·

  • ★★★★★

    Just as advertised

    Exactly what it was advertised as. Follow the directions and you’ll have no issues

    Verified buyer ·

  • ★★★★★

    Shipped fast and professionally packed!

    Verified buyer ·

  • ★★★★★

    New FAV gum!

    I recently went through a diagnosis of SIBO. One of the things that feeds small-bacterial overgrowth is xylitol. I wanted to find a clean, completely natural gum that did not contain any of the artificial ingredients and things our body just should not be consuming. I ordered Greco Gum and have really enjoyed having this as an alternative chew. At first, it is very different and takes a few minutes to really start to appreciate the texture and flavor. It almost feels like you are chewing plastic because of the density; however, there is NO plastic at all. I love it.

    Verified buyer ·

Hundreds of verified customer reviews.

Frequently Asked Questions