I can attest to fasting. I've fasted intermittently three times for 40-day periods, and the effect it's had on my body composition each time is remarkable -- an admixture of galvanizing and exhilarating. The fasting durations were generally the middle of the day period, between an early breakfast and late dinner, so about 13 hours. Another time-slot that I had a lot of success with was skipping breakfast and breaking the fast with a lunch or early dinner and then another meal around 7pm or so. A longer fasting period, but part of it spent sleeping. Fasting changed my relationship with food. It also transformed my understanding of what my limits are. Best of luck. Can't wait to hear about your progress. And thanks for posting mike 's 3-day fast report, I missed it but it's a great post.