I lost a lot of weight on 5:2 diet. Two days a week you limit your intake to 500 calories and eat normally the other 5 days. I also exercise regularly. The 5:2 diet even helps my Chron's and my doctor is ok with it because he says it "gives my digestive system a chance to rest". I've been doing this for 1-1/2 years. I like it because I can have A treat now and then and it doesn't limit any certain food (carbs). You can't go crazy on the 5 days because, in the end, it is still about how many calories do you consume in that week. But, it is better than trying to limit calories every day.