Below is an instruction from Human. Write a response.
    ### Instruction:
    Do you have information about A1C
    ### Response:
    Summary : A1C is a blood test for type 2 diabetes and prediabetes. It measures your average blood glucose, or blood sugar, level over the past 3 months. Doctors may use the A1C alone or in combination with other diabetes tests to make a diagnosis. They also use the A1C to see how well you are managing your diabetes.
    