http://articles.mercola.com/sites/articles/archive/2002/12/21/insulin-part-four.aspxA factor in controlling lifespan in mammals may have been discovered. In a recent study, one copy of the gene that encodes a receptor for insulin-like growth factor type 1 (IGF-1) was deleted from mice, and the altered mice lived 26 percent longer thanenCommunityServer 2008.5 SP1 (Build: 31106.3070)