<p>Functional dairy foods represent a rapidly growing category in the food industry, driven by enormous consumer demand for health promotion and disease prevention. The interplay between probiotics and prebiotics in these products has the potential to enhance their overall health supports. Probiotics, such as <i>Lactobacillu</i>s and <i>Bifidobacterium</i> species, commonly found in fermented dairy foods like yogurt, fermented milk, and whey beverages, support gut health by improving the intestinal homeostasis, that aids digestion, nutrient absorption, and strengthen the immune functionality. Meanwhile, prebiotics, naturally present in foods like chicory root, garlic, onions, and certain whole grains, serve as a nutritional source that promotes the growth of these probiotics. Synbiotics, the combined intake of probiotics and prebiotics, in functional dairy foods creates a synergistic effect, improving the survival and colonization of probiotics in the gut while amplifying their positive effects. It can trigger digestive health, reduce inflammation, and boost host immunity. Additionally, scientific research suggests that synbiotics offer benefits beyond gut health, including improved respiratory health and potential impacts on mental well-being through the gut–brain axis. Dairy products fortified with synbiotics provide a convenient and appealing way to incorporate these health-promoting components into the diet, making them increasingly popular in functional foods. Understanding the interactions between them, as well as the mechanisms behind their synergism, opens the door for developing innovative dairy products with enhanced nutraceutical potential.</p>