How Estrogen Can Become Deadly as You Agehttp://articles.mercola.com/sites/articles/archive/2005/03/05/estrogen-deadly.aspxChanges in blood vessel chemistry may explain why estrogen changes from a heart protector to a heart danger as women age. Before menopause, estrogen functions as a dilator of blood vessels, offering a protective effect to the heart. However, later inenCommunityServer 2008.5 SP1 (Build: 31106.3070)