A lowered HbA1c level is an indication of sustained lowered or reduced blood glucose levels over a period of time. Long-term reduced blood glucose levels in diabetic patients successfully prevent future complications of diabetes, including kidney complications, nerve damage, damage to the retina, cardiovascular diseases, and diabetic foot, among others. Research has shown that a reduction of just about 1% in HbA1c levels reduces the risk of death due to cardiovascular diseases by 45%.