The Benefits of Human Breast Milk in Neonates and Infants

Human breast milk evolves beyond simple nutrition to function as a complex signaling system that promotes neonatal development. This review analyzes the bioactive components, delineating how its specific constituents compensate for the physiological vulnerabilities of the neonate. Additionally, the distinct roles of colostral and mature milk are in fortifying the immature immune system and promoting gastrointestinal maturation. Focus is placed on the prevention of necrotizing enterocolitis, where milk oligo-saccharides and microbiome function to maintain mucosal integrity and symbiosis, while preventing pathogens’ adhesion. Furthermore, it is evaluated how breastfeeding duration is linked to long-term metabolic and immunological programming. Mi-croRNAs and bioactive lipids actively modulate gene expression and immune responses, thereby reducing the incidence of metabolic diseases and childhood malignancies. By integrating findings, this article underscores the irreplaceable role of breast milk in clinical dietetics and pediatric care.