Tuesday, Oct 27, 2026 The claims desk. Receipts included. POWERED BY LENZ ↗
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Studies show silicone bakeware releases siloxanes, not demonstrated microplastic particles.

The Claim

Silicone muffin trays contain or release microplastics during use.

Verified by Lenz ·

The Short Version

Available evidence does not establish that silicone muffin trays contain or release microplastics during ordinary use. Studies do show migration of siloxanes and silicone oligomers into food and air when bakeware is heated, but these are molecular chemicals rather than solid microplastic particles. Conflating the two materially misrepresents what the research demonstrates.

Caveats

  • Siloxane or silicone-oligomer migration is not equivalent to microplastic particle shedding.
  • The cited studies lack direct particle-size and morphology evidence showing microplastic release during normal use.
  • Chemical migration from silicone bakeware may still warrant separate safety consideration.

The Receipts

  1. Migration of 35 Siloxanes from Silicone Food Contact Materials in China and Their Potential Exposure Assessment

    mdpi.com

  2. Influence of cooking conditions on the migration of silicone oligomers from silicone rubber baking molds to food simulants

    sciencedirect.com

  3. Cytotoxicity, endocrine disrupting activity, and chemical analysis of 42 food contact silicone rubber products

    sciencedirect.com

  4. What is silicone and how does it compare to plastic in the kitchen? - ABC News

    abc.net.au

  5. Migration of siloxane oligomers in foodstuffs from silicone baking moulds

    researchgate.net

  6. Analysis of potential migration compounds from silicone molds for food contact by SPME-GC-MS

    zaguan.unizar.es

  7. Characterisation and migration properties of silicone materials during typical long-term commercial and household use applications: a combined case study: Food Additives & Contaminants: Part A: Vol 29, No 9

    tandfonline.com

  8. Safety assessment of silicone molds for food use: A comprehensive analysis of migration patterns and volatile compound release in European markets

    zaguan.unizar.es

  9. Influence of cooking conditions on the migration of silicone oligomers from silicone rubber baking molds to food simulants

    zaguan.unizar.es

  10. HALF BAKED: EU

    beuc.eu

+ 14 more sources — see the full list on Lenz

Filed Under

MicroplasticsSilicone Muffin Trays

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