Milk as Medicine: Unlocking the Hidden Pharmacome of Lactation Biology

Abstract

Human breast milk is increasingly being understood not only as an ideal source of infant nourishment but also as a dynamic biological system rich in pharmacologically active molecules. The concept of “milk as medicine” reflects its intricate pharmacome—an interconnected network of bioactive peptides, immune modulators, lipids, oligosaccharides, antioxidants, and stem cells that exhibit therapeutic properties far beyond basic nutrition. Proteins such as lactoferrin, lysozyme, and α-lactalbumin demonstrate powerful antimicrobial, anti-inflammatory, and anticancer activities, while human milk oligosaccharides (HMOs) shape the gut microbiome and protect against pathogens. Growing evidence also highlights the regenerative and immunomodulatory effects of milk-derived exosomes and stem cells, suggesting significant promise for tissue repair and chronic disease management. In recent years, research has extended beyond neonatal benefits and explored the therapeutic potential of breast milk constituents in adult health, including liver regeneration, wound healing, metabolic balance, and immune modulation. Milk-derived peptides have shown notable antioxidant, antihypertensive, and antitumor effects. As the field of lactation pharmacology continues to expand, these findings point toward new possibilities for developing nutraceuticals, biopharmaceuticals, and regenerative therapies. This review synthesises current evidence to decode the pharmacome of human lactation biology and explore how its molecular diversity could be translated into innovative therapeutic strategies. Understanding breast milk as a biomedical resource offers a new frontier in preventive and regenerative medicine.