Well they said the food weren't high fat content and that they kept to normal foods, just at three times the needed calories. It is fascinating that it only took three days to hit insulin resistance. Basically as soon as you start massively overeating you've got health problems.  "(They were) not given a “fatty diet,” but a diet that was modeled after the typical Western US diet, which consisted of 50 percent carbs, 35 percent fat and 15 percent protein."  3000 calories of carbs, holy shit!