Study shows that there is no significant difference between how much of these foods the fatties eat versus the non fatties. The difference is the amount that is eaten. Regardless of the type of food people eat the main, if not sole, reason people are fat is that they eat too much.
Who would have thought?
BTW, I never really understood the concept of "junk food". I mean, food consists of just three macro nutrients. I do see how any of them in and of itself is "junk". Even the much maligned saturated fat is earning it's due place in a man's diet. You can just consume too much or too little.
Maybe food high in chemicals might be deemed "junk" but chemicals aren't really food. I guess maybe they should be called polluted food.
Polluted foods with chemicals or bacteria I would concede would be bad for you.
http://www.webmd.com/diet/20151105/junk-food-not-to-blame-for-americas-obesity-epidemic-study