t think theres any doubt that whey protein can cause joint swelling in some people who use it, in my experience I started to take whey protein
powder and experienced swelling
in my fingers, my middle finger
in particular seems to swell right up, I stopped taking the whey after a while as i had suspensions as the swelling only started on taking whey, and sure enough the swelling went away, tried again a couple more times in the coming months and both times the swelling came back, never been teste