<prompt> HbA1c control for how much time2 -3 weeks3 - 6 weeks6 - 8 weeks14 - 18 weeks  <response>: Answer- C. 6 - 8 weeksThe half-life of an erythrocyte is typically 60 days, the level of glycated hemoglobin HbA1c reflects the mean blood glucose concentration over the preceding 6-8 weeks. 