Most Helpful Guy
It depends on what sort of strict diet you're on. The most successful weight loss I've seen (a permanent one, or at least 3 years and counting) has come from lifestyle changes. This person is super strict about eating healthy things five days a week, with cheat days on Wednesdays and Saturdays. It's about consistency on those other days, though. If you regulate your body to expect too few calories per day, then it will slow your metabolism and any cheat days at all can mess you up.