Now Vice has produced a short documentary about the self-declared King of Pizza, who says the original article made him "famous".
Janssen has diabetes, but says the only doctor that isn't happy with his diet is his endocrinologist. He claims all of his other doctors tell him: "Your cholesterol is fine. You seem healthy. Keep doing what you're doing."
Janssen is a vegetarian, but doesn't like vegetables. Madeline attempts to get him to put vegetables on his pizza anyway, even though he makes this face when he has to eat them:
Madeline, who says she is a "picky" eater – albeit a healthier one than Janssen – finds his pizza eating "really endearing", but has also encouraged him to see a therapist about his issues with food.
Janssen says that his pizza diet doesn't seem to affect his diabetes, and insists that his blood work from his doctors says he's healthy.
Interestingly, despite being the King of Pizza and eating it almost exclusively for the last 25 years, Janssen still manages to burn his mouth on recently cooked frozen pizza.
You can watch all of Vice's short documentary on Janssen here: