it’s usually suggested that probiotics be taken with a meal that contains prebiotics. Prebiotics are specialized plant fibers found in many fruits and vegetables, especially those that contain complex carbohydrates. These carbohydrates aren’t digestible, so they pass through the digestive system to become food for the bacteria and other microbes. Dozens of foods act as prebiotics, including apples, asparagus, bananas, chicory root, garlic, honey, mushrooms, seaweed, wheat bran, yams, and yogurt.