Probiotic fruits and vegetables, including foods bananas, sweet potatoes help to rebuild the gut microbiome, providing insoluble fibre that feeds good -- but not harmful -- bacteria.Fermented, unpasteurized vegetables like sauerkraut, kimchi, and fermented beets, are another excellent source of natural probiotics. Every vegetable produces different families of beneficial bacteria during fermentation, encouraging patients to eat one forkful of fermented vegetables twice a day. The key to health in your gut is the diversity of your microbiome, pointing out that thousands of different families of bacteria live and interplay in the gut with wide-ranging impacts on our health.