I incorporate 5:2 fasting and it has helped me lose a little. I thought it was rather drastic in the beginning, but tried it and it has worked better for me than anything else. I don't lose much, but feel really good and am happy with the results. I do 500 calories (yes, you would have to count) any 2 days a week that are convenient. The other 5 days I do WW Purple. The book, if you want to check out this type of intermittent fasting is Dr. Michael Moseley's "The Fast Diet". By the way, I am on 125mg Thyroxine per day, so know what you're going through.