I imagine many of you have heard of this study on the news. Here’s a link to the abstract: Arch Intern Med — Abstract: Coffee, Decaffeinated Coffee, and Tea Consumption in Relation to Incident Type 2 Diabetes Mellitus: A Systematic Review With Meta-analysis, Dec 14/28, 2009, Huxley et al. 169 (22): 2053
It basically says that a daily dose of coffee or tea can reduce the risk of getting Type 2 diabetes by 25% to 35%, according to an international study published in the Archives of Internal Medicine.
Specifically, four cups of coffee or tea a day can lead to the 25% to 35% decrease in chances of getting diabetes — or a 7% lowering of risk for every cup.