We're happy to report we use powdered Pea Protein Isolate in our Mighty M.lk. With regards to the suitability for those with IBS, Monash University conducted a study to suggest although Peas are a high FODMAP food, Pea Protein Powder is actually considered a low FODMAP source and should therefore suit your needs. We would always recommend consulting with a medical professional if you have any outstanding concerns about using Mighty M.lk in your diet.