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Sampling, Identification and Characterization of Microplastics Release from Polypropylene Baby Feeding Bottle during Daily Use
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Microplastics in infant milk powder.

Qiji Zhang1, Liu Liu1, Yue Jiang1

  • 1State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.

Environmental Pollution (Barking, Essex : 1987)
|February 9, 2023
PubMed
Summary

Infant milk powder contains microplastics, with boxed varieties showing higher contamination. Feeding bottles contribute significantly more microplastic exposure for infants than the milk powder itself.

Keywords:
Baby formulaInfant formulaMicroplastic exposureMicroplastic sourceMilk powderPackaging

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Area of Science:

  • Environmental Science
  • Public Health
  • Food Safety

Background:

  • Microplastics are ubiquitous environmental contaminants with potential health risks.
  • Infants are a vulnerable population, yet their exposure to microplastics remains poorly understood.
  • Milk powder is a dietary staple for many infants, necessitating an investigation into its microplastic content.

Purpose of the Study:

  • To investigate microplastic pollution in infant milk powder.
  • To quantify microplastic exposure from milk powder, feeding bottles, and preparation methods.
  • To assess the contribution of packaging to microplastic contamination in milk powder.

Main Methods:

  • Analysis of 13 types of infant milk powder with varying packaging, processing, and sources.
  • Comparison of microplastic levels in boxed versus canned milk powder.
  • Calculation of microplastic exposure from milk powder, feeding bottles, and preparation.

Main Results:

  • Boxed milk powder (7 ± 3 items/100g) contained more microplastics than canned milk powder (4 ± 3 items/100g).
  • Plastic and aluminum foil laminated inner packaging of boxed milk powder was identified as a potential main source, emitting 8 ± 2 to 17 ± 1 items/100g.
  • Microplastic exposure from feeding bottles was 6.8 times higher than from milk powder, and preparation was 1.7 times higher.

Conclusions:

  • Infant milk powder is a source of microplastic exposure, particularly boxed varieties due to packaging.
  • Feeding bottles and milk preparation methods contribute more significantly to infant microplastic exposure than the milk powder itself.
  • Further research is needed to understand the full impact of microplastics on infant health and to develop mitigation strategies.