By Shannon Kelleher, PhD, Professor, Biomedical and Nutritional Sciences
Time for a Reframe
Human milk is a "liquid biopsy" — not only nourishment for babies, but a window into women's health.
October 20262 min read
For a long time, human milk (and innovation) has been pretty much exclusively viewed through the lens of infant nutrition...something produced (better support systems), collected (better pumps), and consumed (better formula).
Human milk is a highly sophisticated biological system containing proteins, complex glycans, bioactive lipids, hormones, extracellular vesicles, nutrients, and regulatory RNAs that do far more than nourish an infant.
I'd like to propose that many of these components also reflect the maternal postpartum state.
Changes in inflammatory signaling, metabolic stress, oxidative stress, micronutrient handling, mammary gland function, hormones, and immune adaptation can all be detected in the molecular composition of milk.
Human milk is a "liquid biopsy". It's not only a delivery system for nourishing babies, it's a window into women's health, offering insight into maternal nutritional status, mammary gland health, systemic adaptation to lactation, and the biological drivers underlying challenges such as low supply, inflammation, and impaired milk bioactivity.
When we begin to look beyond volume and macronutrients, we uncover a dynamic molecular language that has the potential to inform biomarkers, guide interventions, and reshape how we understand maternal health during the postpartum period.
Milk is not simply produced. It is communicating. And we're listening at LactoGenix.
As this area continues to evolve, I’m especially interested in insights from those working across lactation biology, infant nutrition, and maternal health. Where do you see the greatest opportunities, or gaps, in translating these ideas forward?