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Updated: Sep 2, 2025

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Microplastics contamination in eggs: Detection, occurrence and status.

Qingrun Liu1, Zhe Chen2, Yulun Chen1

  • 1State Key Laboratory of Food Science and Technology, Jiangnan University, No. 1800 Lihu Avenue, Wuxi 214122, Jiangsu Province, China; School of Food Science and Technology, Jiangnan University, No. 1800 Lihu Avenue, Wuxi 214122, Jiangsu Province, China; Joint International Research Laboratory of Food Safety, Jiangnan University, No. 1800 Lihu Avenue, Wuxi 214122, Jiangsu Province, China.

Food Chemistry
|August 5, 2022
PubMed
Summary

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Microplastics (MPs) are present in eggs, with an average of 11.67 particles per egg, primarily polyethylene. Cooking does not significantly alter MP levels, highlighting the need for control measures.

Area of Science:

  • Environmental Science
  • Food Science
  • Toxicology

Background:

  • Microplastic (MP) contamination is a growing concern in the global food supply.
  • Eggs are a common dietary staple, making their MP contamination a significant public health issue.

Purpose of the Study:

  • To detect and quantify microplastics in commercially available eggs.
  • To characterize the types, shapes, and sizes of microplastics found in eggs.
  • To estimate daily human intake of microplastics from egg consumption.

Main Methods:

  • Eggs were sourced from local supermarkets for analysis.
  • An optimized digestion method was employed for efficient microplastic isolation from egg samples.
  • Fourier-transform infrared spectroscopy was used to identify the polymer types of the microplastics.
Keywords:
CharacterizationDigestionDistribution in eggsEggsEstimation of intakeMicroplastics

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Main Results:

  • Microplastics were detected in all egg samples, with an average content of 11.67 ± 3.98 particles/egg.
  • The predominant microplastic type identified was polyethylene, with spherical shapes and sizes ranging from 50-100 μm.
  • Microplastic levels were higher in egg yolks than in egg whites and remained unchanged after cooking.

Conclusions:

  • Eggs are a confirmed source of microplastic contamination.
  • The findings underscore the ubiquitous nature of microplastic pollution in food products.
  • Recommendations for control and preventive measures are proposed to mitigate microplastic exposure from eggs.