I rarely recommend protein powders because there is usually a million ingredients (many of which you cannot pronounce), contain sugar or sugar alcohols and are actually quite processed (the protein is actually being removed from a whole food, this is processing). I find temperamental tummies really struggle with all of these things. Using a whole food based protein source like nut/seed butter is much more gentle on the tummy. If you struggle digesting nuts/seeds check out this blog post.