The study, by researchers from the University of Adelaide in Australia and Southeast University in China, found that compared with never tea drinkers, daily consumers (never, occasionally, often and every day) ) of dark tea had 53% lower risk for prediabetes and 47% reduced risk for type 2 diabetes, even after taking into account established risk factors known to drive the risk for diabetes, including age, gender, ethnicity, body mass index (BMI), average arterial blood pressure, fasting plasma glucose, cholesterol, alcohol intake, smoking status, family history of diabetes and regular exercise.