Caffeinated and caffeine-free beverages and risk of type 2 diabetes

American Society for Nutrition: 11/14/12

Background: Consumption of caffeinated beverages such as coffee and tea has been associated with a lower risk of type 2 diabetes (T2D). Paradoxically, short-term metabolic studies have shown that caffeine impairs postprandial glycemic control.

Objective: The objective was to prospectively examine the association of caffeinated compared with caffeine-free beverages, including coffee, tea, sugar-sweetened beverages (SSBs), and carbonated artificially sweetened beverages (ASBs), with T2D risk.

Design: We prospectively observed 74,749 women from the Nurses’ Health Study (NHS, 1984–2008) and 39,059 men from the Health Professionals Follow-Up Study (HPFS, 1986–2008) who were free of diabetes, cardiovascular diseases, and cancer at baseline. Read more