I was never a fast food junkie as a kid.  I skipped class, went out with my friends to a local place to eat, and all.  But it was generally one particular smoothie shop that we used to like and has since shut its doors for other reasons outside its food.  The food was great, other parts were not.  However, if your kids are the average teens now showing up in the United States, they are not quite like I was, they like their fast food and they tend to skip class or just drive around during lunch break to get fast food specifically.  They visit vending machines at school, maybe they choose the fattiest foods the school has to offer, and they largely lack nutritional benefits. 

The problem is it’s not just their weight that suffers from these particular habits.  Their thinking also suffers. They don’t do as well in school because their mind is not as sharp as it would be with a healthy diet and exercise plan going.  They may be constantly fatigued, and emotionally they won’t be as well off.  And obviously earlier obesity rates lead to earlier obesity related problems whether in the heart or other areas of the body.