Buy four tins and enjoy 10% off.Free US standard shipping on orders over $100.Now accepting HSA/FSA on eligible orders.*
Greco Gum Logo Icon
User Circle Single Streamline Icon: https://streamlinehq.com
Bottle of Greco Gum mastic gum powder capsules on a light background
Hand holding a capsule of mastic gum powder with product benefits listed on a light background
Greco Gum Mastic Gum Powder Capsules bottle with blue label on a light gray background
Mastic gum powder
Close-up of white Greco Gum mastic gum powder capsules in a container
Bottle of Greco Gum mastic gum powder capsules on a wooden surface with a bowl of capsules.
Mastic gum powder
4.76 from 25 reviews
·
2.8K+ sold

Mastic gum powder

Pure mastic powder in veggie capsules. Targeted gut support, no chewing required.

  • Calms indigestion
  • Reduces bloating
  • Eases heartburn
  • Goes after H. pylori
  • No fillers
  • As low as $0.92/day
Currently out of stock – but will be back soon

Crystallized resin from the mastic tree (Pistacia lentiscus var. Chia), ground into a fine powder. 500 mg per veggie capsule (hypromellose).

Quality & Authenticity Report

Truestar verifies and publishes the certified test results behind every harvest of Greco Gum.

All checks passed

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

ReportGG-685676Lot685676Issued24 June 2026Verifybytruestar.com/GG-685676
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
Identification (TLC)Ph. Eur. monograph for MasticSix coloured zonesconforms
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 685676 · certified by CMGA · 2026-06-24
Heavy Metals

Every batch is screened by ICP-MS before release. The growers’ association reports each metal against its specification limit rather than as a measured figure, so these read as conformance.

ArsenicICP-MSBelow limitspec < 0.05 ppm
CadmiumICP-MSBelow limitspec < 0.05 ppm
LeadICP-MSBelow limitspec < 0.2 ppm
MercuryICP-MSBelow limitspec < 0.05 ppm
Lot 685676 · CMGA Quality Dept. · ICP-MS · 2026-06-24
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 685676 · CMGA Quality Dept. · 2026-06-24
Microbes

Screened by the growers’ association to European Pharmacopoeia methods, with the pathogens required to be absent outright rather than merely low.

Total aerobic countPh. Eur. 2.6.12Conformslimit < 1,000 cfu/g
Yeast & mouldPh. Eur. 2.6.12Conformslimit < 100 cfu/g
E. coliPh. Eur. 2.6.13Absentin 1 g
Staph. aureusPh. Eur. 2.6.13Absentin 1 g
SalmonellaPh. Eur. 2.6.13Absentin 10 g
EnterobacteriaPh. Eur. 2.6.13Conformslimit < 100 cfu/g
Lot 685676 · CMGA Quality Dept. · Ph. Eur. · 2026-06-24
Certified by
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. Truestar verifies the source documents; it does not perform the analysis. Results do not guarantee future performance or shelf life.

I was having some chronic stomach issues and decided to give this a try. After one bottle, I noticed a huge difference! I plan on trying the gum next for dental health!

Mary Z.Verified buyer

Beautiful packaging, easy-to-swallow size, and no aftertaste. Favorite part is the transparency that Greco has with the only ingredient being Chios mastic gum in a veggie capsule.

Shelby S.

Our mastic gum capsules are filled with 100% pure Chios Mastiha. Zero fillers or additives. An effective and natural digestive aid.

  • Single originChios, Greece
  • One ingredientNo fillers
  • 120+ beneficialCompounds
  • Chew-freeGut support
  • Truestar certifiedNo contaminants

With our capsules, you get:

Targeted gut support

Prevents bloating, supports digestion, eases heartburn, and complements H. pylori care.

Chew-free support

Get the gut benefits of mastic without chewing. Comfortable for sensitive teeth.

Neutral taste

No pine flavor or aftertaste. Swallow with water.

Nothing artificial

100% mastic gum powder in a plant-based capsule. No fillers, flavors, or flow agents.

True Chios origin

Sourced from the latest harvest. Carefully cleaned and finely milled.

The highest standards

Encapsulated in the USA in GMP- and NSF-certified facilities.

Plenty of verified customer reviews.

  • ★★★★★

    Can’t wait to try it!

    We just got this and are expecting great things. Excited to see how much it helps with digestive issues.

    Karrah Foster F. · Verified buyer ·

  • ★★★★★

    Indigestion, Stool Quality

    These have helped with my indigestion and stool quality. Got these in a deal that came with some gum too, which feels great for my mouth health

    Andrew S. · Verified buyer ·

  • ★★★★★

    Highly recommend!

    Excellent! My digestion has already significantly improved from only a few days using this paired with Lactoferrin. Highly recommend!

    Cameron T. · Verified buyer ·

  • ★★★★★

    Incredible digestion supplement

    It's amazing feeling your stomach empty and not bloated. Digestion has also been better.

    Luis H. · Verified buyer ·

  • ★★★★★

    Help with gut problems

    I have had stomach problems for a very long time and this powder seems to at the very least help with it. I had alot of acid reflux and buring all the time so I have been taking an over the counter pill everyday. I am hoping that this powder will help and I will not have to take the pill everyday.

    KYLE J. · Verified buyer ·

  • ★★★★★

    Prices a bit high too

    I like the claims made about improving microbiome - more details would be good. So far haven't really noticed but will keep taking it for now.

    Stuart O. · Verified buyer ·

Frequently Asked Questions