Fermented foods like idli, dosa, and dhokla naturally contain live microbes and offer probiotics, vitamins, and minerals. Probiotic supplements, conversely, provide specific bacterial strains in concentrated, measured doses for targeted benefits. While fermented foods are traditional staples supporting digestion and microbial balance, supplements offer predictability with known strains. Experts suggest understanding their distinct mechanisms is key to choosing the right option for individual gut health needs.