A passenger waits for a delayed flight at Heathrow airport's terminal four in London August 12, 2006. (Toby Melville/Reuters)Reuters - Falling levels of a hormone called leptin that helps the brain resist tempting foods may explain why people who lose weight often have a hard time keeping it off, U.S. researchers said on Friday.


This entry was posted on Saturday, June 21st, 2008 at 2:41 am and is filed under Weight Loss News.