Probiotics, Prebiotics, and Synbiotics in Food-Related Health Promotion: Current Understanding, Cross-Sector Applications, and Evaluation of Apple/Pomegranate Extracts as Prebiotics for Lacticaseibacillus rhamnosus IMC501

Beneficial microorganisms, more commonly known as probiotics, have witnessed a surge in popularity due to their remarkable ability to bestow health benefits upon their host when appropriately utilized. This comprehensive review delves into the current understanding of probiotics, exploring their taxonomic classification, physiological efficacy, and diverse applications across human, animal, and aquatic health sectors. Particular emphasis is placed on Lactobacillus and <italic>Bifidobacterium</italic> genera, which have demonstrated substantial capabilities in modulating gut microbiota, fortifying intestinal barriers, and stimulating immune responses. The synergistic combination of probiotics and prebiotics, known as synbiotics, has also shown enhanced health benefits, underscoring the value of integrated approaches. However, the advancement of probiotic technology is not without challenges, as individual responses to probiotic therapies can vary significantly, influenced by factors such as diet, genetics, and the environment. As such, continued research is imperative to develop personalized probiotic formulations, deepen our understanding of their underlying mechanisms, and identify novel functional strains to enhance efficacy. Looking ahead, Future research into probiotics carries substantial promise for enhancing quality of life across varied populations and life stages. This study additionally seeks to explore the prebiotic potential of apple and pomegranate extracts, assessing their effects on the fermentation properties of the probiotic strain <italic>Lacticaseibacillus rhamnosus IMC501</italic>. Given the potential of prebiotics to synergize with probiotics to form synbiotics, this research may unlock new avenues for integrated health improvement strategies.