Man... I don't know.  I don't pee at all (kidney failure) and over 3 days I think the most fluid I had to have removed was 12lbs. And that was me drinking too much. On an average 3 days I gain about 8lbs of fluid - keep in mind, I don't pee at all, but the OP does - so in a week  I have on average 24lbs removed from me.  So I'm gonna call bullshit on this. It may be some water retention BUT not all of it, this fatty is just packing on lard. To no one's surprise but itself. It probably still pees a lot too, so It would be having to drink 100's of pounds of fluid in one week to retain at least 50.  I hope this makes sense lol