Causing diarrhea. Wheat bran banana yogurt is nutrition porridge. The disadvantage is that it will cause diarrhea, because wheat bran is not easy to digest, which will lead to diarrhea and indigestion and affect the body's absorption of nutrients. Moreover, banana yogurt is a cool food, and long-term consumption will cause gastrointestinal problems, so it needs to be eaten regularly and cannot be consumed excessively.