Gut Microbiota-Modulating Functions of Bovine Colostrum and Bovine Milk Oligosaccharides

The gut microbiome is a complex ecosystem composed of trillions of microorganisms that play vital roles in digestion, immune regulation, and overall health. Disruptions in this microbial balance are linked to various metabolic, inflammatory, and neurological disorders. Among dietary components that influence the gut microbiome, oligosaccharides derived from bovine colostrum and milk have gained increasing attention due to their bioactive properties. Bovine colostrum, the nutrient-rich fluid produced in the first days after parturition, contains a high concentration of structurally diverse oligosaccharides and glycoproteins that may selectively promote beneficial bacteria, such as Bifidobacterium species. These compounds are considered crucial to early-life microbial development and may exert prebiotic effects that support intestinal health. While human milk contains a broader variety of oligosaccharides, bovine colostrum and milk share several structurally similar compounds with relevant functions. Oligosaccharides from mature bovine milk have been more extensively studied regarding microbial interactions, enzymatic degradation, and metabolic fate. These findings provide valuable comparative insights into the functional roles of colostrum-derived oligosaccharides. This review highlights the modulatory effects of bovine colostrum and milk oligosaccharides on the gut microbiome, with particular emphasis on the unique contributions of colostrum.