Kefir and yogurt convert the sugars you find in other dairy products into something else. Furthermore, they are probiotic, so they are actually beneficial for us! Candida expert able900 suggested I add both to my diet in addition to a good probiotic supplement. Greek yogurt is better, and when purchasing yogurt or kefir, ALWAYS make sure they are unsweetened! You can use stevia or zylitol to sweeten them yourself and they are yummy!