What is an A1C test?

An A1C test is a crucial blood test that provides a big-picture view of your average blood sugar levels over the past two to three months. Unlike daily finger pricks, which only tell you what your glucose is at that exact second, the A1C measures the percentage of your red blood cells that have sugar-coated hemoglobin attached to them. Since red blood cells live for about three months, this gives a highly accurate historical average. For someone without diabetes, a normal A1C is below 5.7%. For someone newly diagnosed with diabetes, the American Diabetes Association generally recommends aiming for an A1C of less than 7.0%, though your doctor might adjust this based on your specific health profile. Reaching and maintaining this target significantly reduces the risk of long-term complications like nerve damage and kidney disease. It is usually checked two to four times a year. While finger pricks or continuous glucose monitors (CGMs) help you make immediate daily decisions about food and insulin, your A1C is the ultimate report card for your overall management strategy. Both are essential tools for staying healthy.