Zinc and copper concentrations in human preterm milk

Area of Science:

• Nutritional Science
• Pediatrics
• Trace Element Metabolism

Background:

• Zinc and copper are crucial trace elements for preterm infant nutrition.
• Understanding the impact of maternal supplementation on these elements in breast milk is vital for infant health outcomes.

Purpose of the Study:

• To compare zinc and copper concentrations in the milk of mothers receiving or not receiving zinc supplementation.
• To evaluate the effects of maternal zinc supplementation on infant blood zinc levels and anthropometric parameters.

Main Methods:

• Atomic absorption spectrophotometry was used to determine zinc and copper levels in maternal milk and infant blood.
• Thirty-eight mothers and their preterm infants were divided into two groups: one receiving 50 mg daily zinc supplementation, the other not.
• Measurements were taken at 15-day intervals, alongside anthropometric assessments.

Main Results:

• No significant differences were observed in maternal milk zinc, infant blood zinc, or anthropometric measurements between the supplemented and unsupplemented groups.
• A notable decrease in maternal copper levels was observed in the group receiving zinc supplementation.
• Maternal zinc supplementation did not significantly affect zinc secretion into breast milk for preterm infants.

Conclusions:

• Maternal zinc supplementation does not enhance zinc transfer into breast milk for preterm infants.
• Maternal zinc supplementation may negatively impact maternal copper status.
• Further research is needed to understand the implications of altered copper levels in lactating mothers.