Glycated/Glycosylated Hemoglobin (HbA1c or A1c test) is used as a guide to know what your average blood glucose level is during the past three months. Glucose tends to stick to red blood cells and more the glucose in the blood, the more the number of red cells that have glucose on their surface. Normally 4 to 6 red cells in 100 have glucose attached to the surface; hence the range of HbA1c in a normal person is 4 to 6%. Better control of glucose means lesser the complications of diabetes related to your heart, blood vessels, kidneys, brain, nerves, eyes and feet. Keeping your sugars under control means healthier and longer life. It is worth all your efforts.