Soy based protein powders are of interest as many people are looking for a protein powder to accompany their workouts and are simultaneously on the low FODMAP diet. These folks have to become serious label readers to determine which brands and ingredients are appropriate.   Look for the term soy protein “isolate”. This literally refers to the fact that the protein has been isolated and that the product is nearly 90% protein. Soybeans are hulled, flaked and defatted and then milled into a fine flour.   Fiber is reduced during the process as well creating a product that we can eat during the Elimination Phase and beyond. Watch protein powder labels for other FODMAPs though, like inulin for instance.   We have an entire article you may want to read: All About Low FODMAP Meal Replacements, Protein Powders & Protein Shakes