http://articles.mercola.com/sites/articles/archive/2002/09/28/milk-hormone.aspxInsulin-like growth factor-I acts as an important mediator between growth hormone and growth throughout fetal and childhood development. Its effects and those of the other insulin-like growth factors are modulated by at least six different binding proteinsenCommunityServer 2008.5 SP1 (Build: 31106.3070)