4'-Galactosyllactose is primarily utilized in the formulation of infant nutrition products due to its role as a prebiotic. It promotes the growth of beneficial gut bacteria, such as bifidobacteria, which are essential for maintaining a healthy digestive system in infants. Additionally, it enhances the absorption of essential minerals like calcium and magnesium, contributing to bone development. This compound is also being explored for its potential in functional foods and dietary supplements aimed at improving gut health in adults. Its ability to modulate the gut microbiome makes it a valuable ingredient in products designed to support immune function and overall well-being.