He needs to start throwing up after his challenges. Most the professional eaters do and they stay thin and relatively healthy, if that's even possible after eating all that shyt. My thinking is that if you throw it up before it makes it's way to your intestines, your body can't absorb all that trash.
I remember seeing him at the Nathan's hot dog eating competition and he looked like he was about to drop dead. He's been competing in food challenges for years, but rarely wins. He needs to find another hobby/profession.