Does Chewing gum have microplastics?
The short answer
Yes, and unusually the plastic is the product rather than the packaging. Gum base is synthetic rubber. A 2025 pilot measured around 100 microplastic particles released into saliva per gram of gum, with some samples reaching 600.
Why Chewing gum scores 62
The gum base itself is a synthetic polymer, held in the mouth and mechanically worked for many minutes
Chewing is sustained abrasion at body temperature in a saliva medium
Most release happened early in the pilot — within the first couple of minutes of chewing
"Natural" gum bases behaved similarly in the same pilot, so the label is not a shortcut
Where the 62 comes from
Five components, added. The page renders the parts rather than a stored total, so the number cannot disagree with the reasoning behind it.
- Packaging contact
- 26 / 30
- Use conditions
- 20 / 25
- Measured release
- 10 / 25
- Polymer behaviour
- 6 / 10
- Processing
- 0 / 10
What material touches the contents, over how much surface area, for how long. Glass and steel score near zero here; a film pressed against fatty food scores near the top.
Heat, abrasion, flexing, repeated opening, reuse beyond design life. The same bottle scores differently in a fridge and in a hot car.
What a laboratory actually counted, for this product or its category. A high number here means real particles were measured, not that the material looks suspicious.
How this specific polymer behaves — brittleness, fat solubility of its additives, thermal stability, whether it is a polymer named in existing restrictions.
What happened before you bought it. Retort sterilisation inside the pack, hot-filling, and pressurised brewing all happen at the most migration-favourable moment.
What we don't know
The measurement is a pilot study presented at a conference, with one participant and ten brands, and it has not been peer-reviewed. It is the only direct measurement that exists, which is why we cite it and why this page is grade C rather than A. Nobody has replicated it.
This section is on every page in the database, including the ones where the answer is comfortable. How evidence grades work →
Better options
Ordered by how much they change, not by how much they cost.
Chicle-based gum from a brand that states its base
few do, which is itself informative
Mints or breath strips
no gum base, and nothing held in the mouth for twenty minutes
Chew for less time
the pilot found most release happened in the first minutes
Check the one in your kitchen
This page scores Chewing gum as a product. Formulations, packaging and suppliers change, and the specific item you own has its own condition — a scratched pan and a new one are not the same object. Scan yours for a score built from what is actually in front of you.
Scan my packaged foodSources behind this score
Each with the finding we use it for and the limitation that finding carries — because a study quoted without its boundaries is how this subject got so noisy.
- conference2025
UCLA 2025 (ACS, pilot) — Chewing gum released around 100 microplastic particles per gram into saliva, with some samples reaching 600 per gram — synthetic and "natural" gum bases behaved similarly.
Limitation: A pilot presented at a conference, one participant, ten gum brands, not yet peer-reviewed. We cite it because it is the only direct measurement that exists, and we grade pages that rest on it accordingly.
- agency2026
US FDA — States that current scientific evidence does not demonstrate that the levels of microplastics detected in foods pose a risk to human health, while listing detection and characterisation as a research priority.
Limitation: A statement about the state of evidence, not a finding of safety. "Not demonstrated to be harmful" and "demonstrated to be harmless" are different claims, and the agency is explicit that the research is ongoing.