Daily consumption of caffeine in coffee, tea or soft drinks increases blood sugar levels for people with type 2 diabetes and may undermine efforts to control their disease, say researchers at Duke University Medical Center. Scientists used new technology that measured participants glucose (sugar) levels on a constant basis throughout the day. Dr. James Lane, a psychology expert at Duke and the lead author of the study, says it represents the first time scientists have been able to track the impact of caffeine consumption as patients go about their normal, everyday lives........