1 Yoghurt. Live yoghurt is an excellent source of so-called friendly bacteria, also known as probiotics. … 2 Kefir. This probiotic yoghurt drink is made by fermenting milk and is packed with good bacteria. … 3 Miso. … 4 Sauerkraut. … 5 Kimchi. … 6 Sourdough. … 7 Almonds. … 8 Olive oil. … 9 Kombucha. … 10 Peas. … More items…