A hormone like leptin could hold the key to why and how people pile on pounds. Our bodies secrete leptin in response to increasing fat deposits, said Tony Tiganis, professor in biochemistry at the Monash University's Obesity and Diabetes Institute.
http://ummid.com/news/2011/October/17.10.2011/new_harmones_found.htm
http://ummid.com/news/2011/October/17.10.2011/new_harmones_found.htm
