Over a 20-year period, researchers periodically collected detailed information on diet, lifestyle and medical conditions in more than 120,000 participants. They found 7,269 cases of Type 2 diabetes. After controlling for smoking, age, weight, physical activity, alcohol consumption and a family history of diabetes, they found that people who increased their coffee intake by more than an eight-ounce cup a day in a four-year period had an 11 per cent lower risk of diabetes than those whose consumption remained steady.
People who decreased their consumption by the same amount had a 17 per cent higher risk. The report appears online in Diabetologia.