The best mastic gum (2026): a tested & honest buyer's guide

One thing out of the way first: Evexia’s owner also owns Greco Gum, and Greco comes first in this ranking. Weigh that however you like. What follows is the actual reasoning, every real alternative named, and a straight answer on who should buy the cheap stuff instead.

Mastic gum, the hardened resin of the Chios mastic tree, has gone from a Greek grandmother’s remedy to a gut-health and jaw-training obsession. The category is smaller and stranger than it looks: one cooperative that grows the resin, a few grocery jars, a growing crowd of direct-to-consumer brands selling “facial toning guides,” and our own sister brand. The fact that matters most when you’re buying is that most of these are the same raw material at different stages of refinement.

How I evaluated mastic gum

Every option here is scored on the same five things: purity (single-ingredient 100% Chios mastiha), refinement and third-party testing (cleaned-up, verified resin versus raw commodity), consistency and format, who actually stands behind the product, and value per gram, where value means more than the lowest sticker price. My full review methodology explains the process. Greco gets held to the same bar as everything else. It clears all five, and I’ll show you the one place it doesn’t lead, which is absolute price.

What to look for when buying mastic gum

• One ingredient. The label should read 100% Chios mastiha and nothing else: no gum base, no sugar, no “natural flavors.” The classic mistake is buying a flavored gum. ELMA, for instance, is a perfectly good breath gum, but at about 5% mastic in a standard gum base^[9] it isn’t a mastic chew.
• Chios origin, and what PDO does and doesn’t tell you. Real mastic is “Masticha Chiou,” an EU Protected Designation of Origin.^[5] That certifies where it’s from, not how good it is. Nearly all genuine mastic starts as the same Chios resin, so “authentic” and “good” describe different things; what actually varies is how well the resin is cleaned, sorted, and tested afterward.
• Refinement and testing. Raw tears are the unprocessed resin straight off the tree: cheapest, but dusty, variable, and unverified. A refined, third-party-tested product is a genuinely different tier of consistency, and it’s the one worth paying for if this is a daily habit.
• A disclosed weight. You should always be able to work out the price per gram. If a brand won’t even tell you how much gum is in the package (one popular one doesn’t^[10] ), walk away.
• Who stands behind it. Mastic is a natural resin; tins get left in hot mailboxes and batches vary. If yours arrives melted or off, you want a company that will make it right, not a nameless bag from a commodity seller. If you’re new to mastic, start with what it is and how to chew it.

Why Greco is the one I’d buy

The honest case rests on that refinement point. Greco starts with the same genuine Chios PDO resin the “authentic” cooperative sells, then does the work the cooperative doesn’t: it filters and refines the resin a second time, sorts it, third-party tests it^[8] , and packs it as consistent single-ingredient pieces (including droplets shaped for jaw training), with a real company standing behind every tin.

The growers’ association is the source, not a finished product. Its own consumer offering is unrefined raw tears or a 5%-mastic gum, and there’s no one to call when something’s wrong. Krinos and bulk tears are cheaper because they’re the commodity version of the exact same thing: same origin, less refinement, more variance, no testing, no support. You pay more for Greco to close that gap.

Greco costs more, roughly double a commodity jar. Whether that’s better value is the question that matters, and for anyone who wants a reliable daily chew I think it clearly is: more good, consistent gum per dollar of hassle, and a company on the hook if a tin isn’t right.

When the cheaper option is the right call

I won’t insult you by pretending the cheap options aren’t real mastic. They are genuine Chios resin. If all you want is the lowest-priced real mastic and you don’t care about refinement, testing, consistency, or support, buy raw tears in bulk or a Krinos jar. You’ll pay roughly half, and you’ll get real mastic that’s dustier, more variable, and on you to sort out. For plenty of people (cooks, tinkerers, budget chewers) that trade is completely fine, and I’d rather you buy that knowingly than buy nothing. For anyone who wants a dependable daily chew, it isn’t the right trade.

Where to buy: grecogum.com and Amazon US (Greco), US Greek and Mediterranean grocers plus Instacart (Krinos), Amazon US (raw tears), and European sellers like the growers’ association or Mastic Life if you want to import and don’t mind slow shipping.

One thing not to buy as “mastic gum” is Nathan & Sons Underbrush. It’s a decent hydroxyapatite oral-care gum, but mastic is only one of several gums in its base plus a flavor name, so it isn’t a mastic gum and I’d feel bad letting you buy it as one. I reviewed it on its own terms here.

Best mastic gum for jaw training and mewing

The r/Mewing crowd chews mastic because it’s hard, and that instinct is sound. Mastic is a genuinely firm resin, so it makes a real resistance chew: it works your jaw muscles and reliably builds bite force.^[6] That part is legit, and it’s where Greco’s firm droplets, shaped for exactly this, earn their place.

The caveat I’d rather give you straight: resistance chewing is not proven to sculpt a jawline, and to the extent your chewing muscle grows, a bigger masseter tends to widen the lower face, not chisel it.^[6] I wrote the whole honest breakdown in our mewing guide. Chew mastic because it’s a satisfying, purposeful hard chew, not because a gum will hand you a jawline.

Best mastic gum for H. pylori and gut health

The part that matters for buying is refinement. Mastic killed H. pylori in the lab back in 1998^[4] , but crude resin carries an insoluble polymer that blunts that activity in the body; strip it out and purified mastic works.^[3] That single finding is the whole case for a refined, tested product over a raw commodity bag, and it’s why the ranking above weighs refinement as heavily as it does.

On the clinical side, briefly: a randomized trial found mastic cleared H. pylori in about a third of people taking it alone^[2] , well short of what antibiotics achieve, and a placebo-controlled trial found it eased indigestion-type symptoms in 77% of people versus 40% on placebo.^[1] For Crohn’s and IBD the evidence is still limited.^[7]

This is a buying guide, so I’ll keep it at that. The full evidence, the four-arm trial data, and how mastic fits alongside eradication therapy are in H. pylori natural treatment, and the wider mastic research is in mastic gum benefits.

The picks, ranked

The full ranking is below, scored on that same five-point bar. Greco is my number one pick, so read the case above and judge it for yourself. I’ve scored every real alternative too, including the cheaper ones I’d genuinely point you to if absolute price is all that matters.