Oh, FFS:
After a week of eating 6,200 calories a day — with a diet rich in carbohydrates and fat that included foods like hamburgers, pizza and cookies — the men gained nearly 8 lbs. (3.5 kilograms), on average. All of this added weight was fat.
Emphasis mine. Hey, guys (and/or gals). There are these things called “controls.” They’re all the rage among real scientists, I hear.
Hamburgers, Pizza, and Cookies are what I call Carbs. Now, if they ate 6,200 calories of Filet Mignon with a garlic butter sauce, or beef jerky, or eggs and T-bone, and then gained 8 lbs, I might wonder. Then again 6,200 calories of anything, unless you are an athlete, is likely going to cause weight gain.
Hamburgers aren’t much carbs, other than the bun. And it would be hard to eat 6000 calories of those other things.