Longitudinal study of chromium in human milk

Area of Science:

• Nutrition Science
• Environmental Health

Background:

• Breast milk is a primary source of nutrition for infants.
• Trace elements like chromium play vital roles in infant metabolism and development.
• Understanding chromium levels in breast milk is crucial for assessing infant nutritional status.

Purpose of the Study:

• To quantify chromium concentration in human breast milk.
• To evaluate the daily chromium intake of exclusively breastfed infants.
• To determine if chromium levels change during different lactation stages.

Main Methods:

• Low temperature ashing and graphite furnace atomic absorption spectroscopy were used for chromium analysis.
• Breast milk samples were collected from 10 lactating mothers across various lactation periods (early, mid, and late).
• Samples represented a full 24-hour feeding cycle, including foremilk and hindmilk.

Main Results:

• The mean chromium concentration in breast milk was 0.39 (SD 0.15) ng/ml.
• The mean estimated daily chromium intake for infants was 0.27 (SD 0.11) microgram/day.
• No statistically significant variations in chromium concentration or infant intake were observed with advancing lactation stages.

Conclusions:

• Lactation stage does not appear to significantly influence chromium levels in breast milk or infant intake.
• The findings suggest a consistent supply of chromium to exclusively breastfed infants throughout the initial months of lactation.
• Further research may explore factors influencing chromium bioavailability and infant utilization.