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A Method for Targeted 16S Sequencing of Human Milk Samples
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Protein Evolution of Human Milk.

Sagar K Thakkar, Francesca Giuffrida, Emmanuelle Bertschy

    Nestle Nutrition Institute Workshop Series
    |June 24, 2016
    PubMed
    Summary

    Human milk (HM) provides essential nutrition for newborns. This study found that protein concentration in HM decreases from 30 to 120 days postpartum, with no observed gender differences.

    Area of Science:

    • Human milk composition
    • Infant nutrition
    • Lactation biology

    Background:

    • Human milk (HM) is the recommended sole source of nutrition for infants in early life.
    • HM contains essential lipids, carbohydrates, and proteins crucial for infant growth and development.
    • Protein concentration in HM varies significantly from colostrum to mature milk.

    Purpose of the Study:

    • To assess the changes in human milk protein content during the first 120 days postpartum.
    • To investigate potential gender-specific differences in milk protein concentration.
    • To consolidate existing literature data on human milk protein evolution over the first year of lactation.

    Main Methods:

    • Observational, single-center, longitudinal study.
    • Collection of human milk samples from 50 mothers at 30, 60, and 120 days postpartum.

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  • Analysis of protein content and comparison between genders and time points.

    • Main Results:

    • Protein content in human milk decreased from an average of 1.45 g/100 ml at 30 days to 1.38 g/100 ml at 120 days postpartum.
    • No significant gender differences in protein content were observed at 120 days postpartum.
    • Literature data on protein evolution during the first year of lactation was also compiled.

    Conclusions:

    • Human milk protein concentration naturally declines in the early postpartum period.
    • Lactation stage, not infant gender, is a key factor influencing milk protein levels.
    • Understanding these compositional changes is vital for infant nutrition and health.