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A new pilot study suggests that chewing gum may be an unexpected source of microplastic ingestion. Researchers from the University of California, Los Angeles (UCLA) found that a single piece of gum can release hundreds to thousands of microplastic particles into saliva, potentially adding to the growing concern over plastic exposure in everyday life.
The findings, presented at the American Chemical Society (ACS) Spring 2025 meeting, reveal that both natural and synthetic gums release microplastics at similar levels, contradicting initial assumptions that synthetic varieties would be worse. The study tested 10 different brands, with results showing that a gram of gum could release up to 600 microplastic particles. Given that a typical piece weighs between 2 and 6 grams, an average gum chewer could ingest approximately 30,000 microplastics per year.
Lead researcher Sanjay Mohanty emphasized that while the health effects of microplastics in humans remain unclear, previous studies suggest potential risks based on animal and cell-based research. The study found that most plastic particles detached from gum within the first two minutes of chewing due to abrasion, rather than chemical breakdown.
While further research is needed to assess smaller plastic particles, Mohanty advises gum users to be mindful of potential exposure. Additionally, he urges proper disposal of used gum, as it contributes to environmental plastic pollution.
The study was supported by UCLA and the University of Hawaii, with funding from the National Institutes of Health.
With information from EurekAlert.org.
