Fasting has no upper limit. In the 1970s, a twenty-seven-year-old Scottish man started fasting at a weight of 456 pounds. Over the next 382 days, he subsisted on only noncaloric fluids, a daily multivitamin, and various supplements, setting the world record for the longest fast. A physician monitored him during the fasting period and determined that there were no significant deleterious health effects. His body weight decreased from 456 pounds to 180 pounds. Even five years after his fast, he remained at 196 pounds. His blood sugar level decreased but remained well within the normal range, and
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