
Greco Gum
One ingredient: PDO Chios mastic resin. The strongest public batch testing in our review, covering heavy metals, pesticides, microbes and identity.
Independent guide · UK first · Updated August 2026
Evidence-led rankings of gums made without conventional plastic bases.
Most conventional gum hides its base behind one vague phrase. We rank the brands willing to show what you are actually chewing.
The 2026 leaderboard
Scores reflect the strength of the public evidence we could verify—not marketing volume, popularity or payment.

One ingredient: PDO Chios mastic resin. The strongest public batch testing in our review, covering heavy metals, pesticides, microbes and identity.

Best flavour variety
Fully specified chicle base, paper box and a broad cane-sugar range plus xylitol options.

Best conventional-style range
Eight flavours, explicit chicle sourcing and plastic-free cardboard packaging.

Best organic choice
Certified-organic rainforest chicle with a strong sourcing and biodegradability case.

Best mainstream UK option
Widely available, six flavours and a disclosed plant-derived ingredient list.
Also reviewed: Nuud, Forest Gum, Georganics, Chewsy, BenBits and Minvelle. Product images are sourced from each brand’s public product or social preview page. Rankings are independent.
Our method
We reward precise ingredient disclosure, product-specific lab reports, responsible packaging and credible environmental evidence. Missing evidence scores zero—it does not automatically mean a product failed.
Read the complete methodology →Evidence desk
Our editorial layer separates what a study actually shows from what a product page implies.
Why the catch-all ingredient makes plastic-free claims unusually hard to compare.
Read the guide →A 2025 pilot detected particles from natural and synthetic gums but did not identify brands.
Dental benefits, emerging cardiovascular signals and a crucial warning for dog owners.
Editorial standard
No invented precision
We publish what the source supports and label missing evidence clearly.
No pay-to-rank
Commercial relationships never determine editorial position.