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Related Experiment Video

Updated: Feb 18, 2026

Individualized Reconstitution of Human Milk Microbiota: A Feasible Approach in Real-World Settings
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Individualized Reconstitution of Human Milk Microbiota: A Feasible Approach in Real-World Settings

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Human milk H2O2 content: does it benefit preterm infants?

Monika Cieslak1, Cristina H F Ferreira2, Yulia Shifrin1

  • 1Physiology and Experimental Medicine Program, Hospital for Sick Children Research Institute; Department of Paediatrics and Physiology, University of Toronto, Toronto, Ontario, Canada.

Pediatric Research
|November 23, 2017
PubMed
Summary
This summary is machine-generated.

Human milk

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Rapid Isolation of Human Breast Milk-Derived Extracellular Vesicles
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Area of Science:

  • Biochemistry
  • Neonatal Nutrition
  • Human Milk Composition

Background:

  • Human milk contains antimicrobial hydrogen peroxide (H2O2).
  • Preterm infants receive expressed and stored milk, potentially reducing H2O2 benefits.
  • Understanding H2O2 generation and degradation is crucial for neonatal care.

Purpose of the Study:

  • To identify factors influencing H2O2 generation in breast milk.
  • To investigate the stability and degradation pathways of H2O2 in human milk.
  • To assess the impact of milk handling on H2O2 content for preterm infants.

Main Methods:

  • Evaluated H2O2 generation/degradation in human and rat milk and mammary tissue.
  • Assessed the roles of oxytocin and xanthine oxidase in H2O2 production.
  • Measured H2O2 pH-dependent stability and degradation by lactoperoxidase and catalase.

Main Results:

  • Xanthine oxidase in breast tissue generates H2O2, stimulated by oxytocin.
  • Human milk H2O2 stability is greatest in acidic conditions.
  • H2O2 rapidly degrades at room temperature within 10 minutes, inhibited by lactoperoxidase and catalase.

Conclusions:

  • Fresh breast milk's H2O2 content is unstable and degrades quickly at room temperature.
  • Investigating milk handling methods is essential to preserve H2O2 for preterm infants.
  • Further research is needed to optimize milk storage and feeding practices.