» What you should know before starting the low FODMAP diet that can help treat GI issues like bloating and diarrhea What you should know before starting the low FODMAP diet that can help treat GI issues like bloating and diarrhea Jennifer Larson,Melissa Rifkin,Katie WalshDec 25, 2020, 00:59 IST It's important to slowly add high FODMAP foods back into your diet since they contain important nutrients that maintain a healthy microbiome.NataBene/ Getty Images The low FODMAP diet is a temporary, elimination diet designed to help people with gastrointestinal disorders. On a low FODMAP diet, you should avoid foods that contain large amounts of FODMAP carbs like fructose, sorbitol, and lactose.