The VLPFC (ventro lateral prefrontal cortex) controls our braking system and helps us inhibit behavior and exercise self-control. This area is easily exhausted and uses up large amounts of glucose and oxygen to function. SO exercising lots of self-control in one area actually decreases your ability to exercise self-control in another. If you’ve used will power to resist the chocolate, you will likely lose some self-control in other areas that day. So–be patient with yourself when you are trying to change your habits.