Change the foundation.

NEWS FLASH.... DIETS DON'T WORK, CHANGING YOUR THINKING DOES!
The reason diets don't work is because the focus is on the eating alone.  With the restricted method the results will be short-lived if the thinking that caused the weight gain is not changed.
The result will be the return of the loss weight, plus added pounds for interest.  
Diets will never get at the heart of the true issues that causes out of control eating in the first place.  Healing of the heart needs to happen, and God is wanting to get at our heart issues like abandonment, rejection, loneliness, and pride to name a few.
The heart of the issue are the real problems and not the food alone.  Once we face the real issues, then we can be healed and begin to let a healing start. The process of renewing and changing our minds then will help us to catch up with the person we are becoming without all the extra pounds.  The pouring of a new foundation in your thinking is necessary if the main goal is to loss the weight and then keep it off.
Change the root, Change the fruit.