Someone examined the data they were putting up about this guy, and they could clearly see evidence of them going to the bathroom and blood chemistry changing in reaction to food and stuff, I'm trying to find the link.
EDIT: That was someone else I was thinking of, though this guy the blood chemistry from the last time they did this (same guy, same "Doctor") it was clear from the blood chemistry the guy was close to kidney failure. And they refused to let people in to verify the conditions.
http://www.skepdic.com/skeptimedia/skeptimedia90.html
Thread on it:
http://forums.randi.org/showthread.php?t=174949
