Mother's milk and hydrogen peroxide

Area of Science:

• Biochemistry
• Human Physiology
• Lactation Biology

Background:

• Hydrogen peroxide (H2O2) is a reactive oxygen species with known biological roles.
• Understanding H2O2 dynamics in human breast milk is crucial for infant nutrition and health.
• Previous research has not fully characterized H2O2 levels throughout the early postpartum period and its stability during storage.

Purpose of the Study:

• To quantify hydrogen peroxide (H2O2) levels in human breast milk during the initial four weeks postpartum.
• To assess the stability of H2O2 in breast milk when stored at freezing temperatures for up to one month.

Main Methods:

• Human breast milk samples were collected at different postpartum time points.
• Hydrogen peroxide (H2O2) concentrations were measured using a luminol-dependent chemiluminescence assay at pH 9.8.
• Samples were also stored at freezing temperatures for varying durations to evaluate H2O2 stability.

Main Results:

• Peak H2O2 levels were observed in the first postpartum week (24.992 ± 0.168 µM).
• H2O2 concentrations significantly decreased weekly: second week (20.4 ± 0.169 µM), third week (15.783 ± 0.782 µM), and fourth week (8.75 ± 0.27 µM).
• H2O2 levels demonstrated stability in breast milk stored at freezing temperatures for at least one month (P > 0.05).

Conclusions:

• Human breast milk H2O2 concentrations exhibit a significant decline during the first month postpartum.
• The findings suggest that H2O2 is a dynamic component of early lactation.
• Frozen storage preserves H2O2 levels in breast milk, indicating its potential stability for nutritional or therapeutic applications.