A Harvard study led by Orfeu Buxton showed that people who were sleep deprived had a slowdown in their metabolism and a one-third reduction in insulin production. This increased the blood glucose, which in turn increased the risk of diabetes and obesity. The lack of sleep also results in various psychological disorders and fatigue. Most people required 8 hours of sleep a day. A key question to ask is “do you fall asleep easily or get drowsy during the day?”
See Bloomberg News, seen in the Toledo Blade, April 12, 2012, Section A, page 8.