For those big eaters who realistically will never give up eating huge amounts of questionable food. You must increase the metabolism. The cure is so simple it is overlooked in the quest for exotic diets and ecercise routines:
1. Eat 60% muscle building healthy foods: protein, fruits, veggies, sweet potatos. Eat 40% junk: ice cream, candy, pizza, pastries, etc. The only caveat here is to eat it after you've had a meal from the 60% category.
2. Lift weights like crazy. Put yourself on a weightlifting program that hits all the muscle groups twice a week. Use compund lifts followed by isolation lifts. Lift hard like your life depends on it.
It's that simple. This will turn an obese body into a thick , stocky, powerful, muscular physique in a year's time. You may never be ripped with a six pack, but you were never going to anyway. With this program you will build self esteem, get compliments from others and get laid.