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A review of kitchenware as a source of microplastics in food
Summary
This review pulls together existing studies showing that everyday plastic kitchen items, like kettles, food containers, baby bottles, and cutting boards, shed tiny plastic particles into our food and drinks, especially when exposed to heat or scraping. Plastic baby bottles seem to be a particular concern, potentially exposing infants to higher amounts of these particles during feeding. While it's not yet clear exactly how much this matters for health, the findings suggest that everyday kitchen habits are a real, often-overlooked source of plastic exposure worth paying attention to.
Plastic-based kitchenware is increasingly recognised as a direct source of microplastics (MPs) and nanoplastics (NPs) in food and beverages during everyday use. This review synthesises current experimental evidence on MP and NP release from commonly used kitchen items, including kettles, plastic food containers, infant feeding bottles, and cutting boards. Across all categories, plastic materials consistently released MPs and, in many cases, NPs under realistic conditions involving heat, mechanical abrasion, and repeated use. Polypropylene-based products were the most frequently studied and exhibited high particle release, particularly during high-temperature exposure and in the early stages of use. Reported particle concentrations varied widely, reflecting substantial methodological heterogeneity and analytical limitations, particularly for nanoplastics. The findings indicate that domestic food preparation and storage represent a non-negligible pathway of human exposure to plastic particles, with infants potentially experiencing disproportionately high exposure through feeding-related materials. To improve exposure assessment and support risk evaluation, future research should prioritise standardised testing protocols, integrated micro- and nanoplastic analysis, realistic food-contact conditions, and long-term use scenarios.