How familiar are you with the Ketogenic diet?  Is that something you've tried? 
My husband and I actually did some research on it a couple weeks ago. We have tried other diets that are similar. 
Was it successful?  I have some friends who tried it, but I can't tell if it's just a fad diet or if it really works. 
I would say it's very effective. Mostly because you're cutting sugar and secondly because you're cutting carbs. Those were the two things we did with the other diet and the results have been great so far. 
I tried the Elimination Diet, but that backfired after a couple days of drinking weird green liquids.