Just an FYI i have no information on GMO's but I'll have to look into it.
The average person burns approximately 2000 calories a day. Go through the average diet and tell me if they are consuming more than 2000 calories a day.
Breakfast, Muffin + coffee = 500 calories.
Lunch = Subway + soft drink + snack = 900 calories
Supper = rice with meat + soft drink = 900 calories
That's an average diet of someone who doesn't eat like a pig and you're already at +300 calories. Throw in the junk food (chips, etc) and you'll easily find people consuming 3000-4000 calories a day.