It depends on what your body can tolerate. Some people do well with yogurt and other dairy products. Make sure you are getting a plain yogurt with the live active cultures in tact. Keifer is a great option and Greek yogurt is a healthy yogurt to add as it is high in protein and can help you feel full longer. Many people do better on a dairy free diet due to the inability to digest lactose. In this case I would use almond, rice or coconut milk as a dairy alternative. Coconut keifer is a great cultured product, just be careful with the almond and coconut yogurts, those can be very high in sugar.