The key is to eliminate the carbohydrates that turn to sugar quickly in the body particularly grains. The name of the game is insulin management. Without boring you with science eating excess carbohydrates end up in fat cells. If the only dietary step you took were swapping grains for vegetables it would help boost the rate you lose excess body fat and weight quicker than the popular diet approach.
That sounds like a bold claim to make but it is totally achievable when coupled with reasonably hard work in the gym.