Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Diabetes ?
    ### Response:
    Prediabetes means your blood glucose levels are higher than normal but not high enough for a diagnosis of diabetes. In 2012, about 86 million people in the U.S. had prediabetes, and 51% of those 65 or older had prediabetes. People with prediabetes are at an increased risk for developing type 2 diabetes and for heart disease and stroke.
    