International Journal of Science, Engineering and TechnologyAuthors: Sneha Shende, Madhav Patil, Gajanan Narnaware, Prasad Patil
Abstract: : Galacto-oligosaccharides (GOS) are nondigestible or partially digestible carbohydrates that have attracted considerable attention for their ability to selectively support beneficial intestinal microorganisms and their potential applications in functional foods. They occur naturally in human milk and certain plant-derived foods and are commercially produced primarily through enzymatic transgalactosylation of lactose using β-galactosidase. GOS composition, degree of polymerization, and glycosidic linkages influence its fermentation characteristics, microbial selectivity, and technological functionality. Their principal prebiotic mechanism involves microbial utilization in the intestine, which changes microbial composition and increases metabolite production, particularly short-chain fatty acids, that support intestinal and systemic physiological processes. Research has examined GOS in relation to bowel function, mineral absorption, immune responses, metabolic health, and infant nutrition product development. However, the magnitude and consistency of these effects depend on the GOS preparation, dosage, duration of consumption, background diet, and characteristics of the individual microbiome. Excessive intake may cause gastrointestinal discomfort, including bloating and flatulence. Recent advances in enzyme engineering, bioreactor design, analytical characterization, and valorizing dairy by-products have expanded opportunities for sustainable GOS production. This review critically examines GOS chemistry, production, mechanisms of action, potential health effects, safety considerations, and food applications. It also identifies research priorities, including structure–function relationships, personalized prebiotic interventions, long-term clinical evaluation, and the development of cost-effective production technologies. Stronger integration of mechanistic, clinical, and food-processing research will be essential to translate GOS science into evidence-based functional food innovations.Keywords- Customer Satisfaction, Quick Service Restaurant, KFC, Food Quality, Service Speed, QSR Marketing, Consumer Behaviour.
DOI: https://doi.org/10.5281/zenodo.23262914
