It's a common scenario for many: after a night of poor or interrupted sleep, your first move, before doing anything else, is to drink a mug or two of coffee. However, new research from the Centre for Nutrition, Exercise & Metabolism at the University of Bath suggests this pre-breakfast java does a number on your metabolism's ability to control blood glucose (sugar) levels. Keeping those blood glucose levels in check is a key part of reducing risk for conditions like diabetes