Probiotics are live bacteria that support gut microbiota balance, improving digestion and strengthening immunity. Good sources of probiotics include yogurt, kefir, sauerkraut, and miso. Prebiotics are fiber-rich foods that feed beneficial bacteria, helping them thrive. You can find prebiotics in vegetables like onions, garlic, and asparagus, as well as whole grains. Symbiotics combine probiotics and prebiotics, creating a synergistic effect. Options here include yogurts with added fiber or specialized supplements. The choice depends on your goals, but incorporating all three is ideal for comprehensive gut health.