Fermented foods contribute to a healthier gut by introducing probiotics, which are beneficial bacteria that promote a balanced gut microbiome. This process enhances disease resistance and aids in the digestion and absorption of nutrients. Additionally, fermented foods can improve gut lining integrity, potentially reducing inflammation and preventing gastrointestinal disorders. Examples include yogurt, kimchi, and sauerkraut, which not only enhance gut health but can also support overall immune function and mental well-being through the gut-brain connection.