Kefir is a fantastic dairy option as the fermentation process not only produces a probiotic rich drink, but contains an awesome 10 strains of beneficial bacteria as opposed to most commercial yoghurts with a typical 3-4 strains.
Start with 200ml each day and see how you feel! Drink straight or in a smoothie or on top of cereal. To taste, Kefir has a mild ‘tang’ due to it’s fermented nature.