New Research Sheds Light on the Complex Components of Human Milk - Video

Two studies published in Science have shed new light on how maternal nutrition influences human breast milk and how milk composition may reveal information about mammary gland function and infant growth.

The studies were conducted by the International Milk Composition (IMiC) Consortium, a global collaboration led by the University of Manitoba. Researchers analysed nearly 2,000 human milk samples collected from more than 1,000 mother-infant pairs in Canada, Burkina Faso, Tanzania and Pakistan. The samples were examined for over 25,000 compounds to understand the complex biology of human milk.

The first study found that certain components of human milk respond to maternal nutritional supplementation during lactation. These included B vitamins, selenium and triglyceride profiles, while other components remained relatively unchanged.

The findings suggest that targeted nutritional supplementation after childbirth could improve the micronutrient content of breast milk, particularly in regions where maternal undernutrition is common.

Researchers highlighted that human milk is not simply a reflection of a mother's diet. Instead, it is a highly regulated biological system in which different components respond differently to nutritional changes.

Understanding these differences could help researchers develop more targeted nutritional interventions to support infant health.

The second study identified molecular patterns in human milk associated with different aspects of mammary gland function, including milk production and secretion, epithelial barrier integrity, tissue remodelling, immune activity and tissue repair.

According to researchers, analysing these patterns could help explain connections between maternal metabolism, mammary gland biology and infant growth.

The findings also suggest that human milk provides a non-invasive way to investigate the functioning of the lactating breast across diverse populations.

Together, the studies expand scientific understanding of human milk beyond its nutritional composition. However, further research is needed to translate these findings into clinical recommendations.

REFERENCE:

1. April Jauhal et al. ,Shared patterns of human milk composition link mammary gland function to infant growth.Science0,eaee7240DOI:10.1126/science.aee7240

2. Trenton Dailey-Chwalibóg et al. ,Nutritional interventions’ impacts on human milk: Three trials in low-resource settings.Science0,eaee9284DOI:10.1126/science.aee9284