http://articles.mercola.com/sites/articles/archive/2002/08/17/coffee-tea-stress.aspx85% of U.S. adults consume caffeine daily and they are prone to increased blood pressure, meaning greater chances of heart disease, and feeling more stressed than if they didn't drink their coffee, cola or tea. The Duke University research team foundenCommunityServer 2008.5 SP1 (Build: 31106.3070)