Foods to Nurture Your GUT MICROBIOME. To nurture your health lifestyle microbiome, it includes foods rich in prebiotics, probiotics, and fiber. Which Prebiotics, found in garlic, onions, and bananas, feed beneficial bacteria. Probiotics, present in yogurt, kefir, and sauerkraut, add healthy bacteria. Fiber-rich foods such as fruits, vegetables, and whole grains support overall human health. Incorporating these foods promotes a balanced and thriving healthy microbiome. Happy Gut, Happy You!