Trace element compositional changes in human milk during the first four months of lactation

Area of Science:

• Human milk composition analysis
• Trace element metabolism in lactation
• Nutritional biochemistry

Background:

• Human milk is a vital source of nutrients for infants.
• Oligoelement concentrations in breast milk can vary.
• Factors influencing milk composition require further investigation.

Purpose of the Study:

• To assess changes in specific oligoelements in human milk during the first four months postpartum.
• To correlate these changes with total antioxidant status (TAS).
• To examine relationships with maternal age, parity, and supplement intake.

Main Methods:

• Collection of human milk samples from 31 lactating women at multiple time points (1-16 weeks postpartum).
• Quantification of 13 trace elements using inductively coupled plasma-mass spectrometry (ICP-MS).
• Statistical analysis to correlate element levels with TAS, maternal factors, and supplement use.

Main Results:

• Most oligoelements showed decreasing concentrations from week 1 to 4 months postpartum.
• Significant correlations were observed between TAS and Cobalt (Co), Vanadium (V), Rubidium (Rb), and Thallium (Tl).
• Differences in Nickel (Ni) and Rb were noted between primiparous and multiparous mothers; Rb and Barium (Ba) increased with maternal age over 30.
• Elevated Rb, Molybdenum (Mo), and Tl levels were associated with maternal supplement intake.

Conclusions:

• Human milk oligoelement profiles change significantly during early lactation.
• Maternal factors, including age and supplementation, play a role in modulating milk trace element content and TAS.
• These findings highlight the dynamic nature of human milk composition and its relationship to maternal health and diet.