Food intolerance after wls in Gastric Bypass Surgery Forums Posted November 13, 2022 · Edited November 13, 2022 by StaffiwMarocson19 You are dehydrated, as the others have said. You can skip the Protein Drinks if you cannot tolerate them, but you must consume Water. Try simple, room-temperature water first; many people initially experience discomfort from cold beverages. The really cold water made my pouch uncomfortable for a bit after my https://www.intolerancelab.co.uk/food-intolerance-test/. Your complaining about poor taste is another issue that worries me. You might wish to get tested for Thrush, even though this might also be a sign of dehydration. It is a yeast infection that can cause food to taste off. Additionally, most Protein Shakes contain dairy.