Chronic Kidney Disease: A Silent Threat - Expert Warning

Hemoglobin A1c, commonly known as HbA1c or glycated hemoglobin, is a laboratory test that measures the average blood sugar levels over the past two to three months. This test is essential for diagnosing and monitoring diabetes mellitus. When glucose circulates in the bloodstream, it naturally attaches to hemoglobin, the protein in red blood cells responsible for carrying oxygen. The higher the glucose levels in the blood, the more glucose binds to hemoglobin. Since red blood cells typically live for about three months, the HbA1c test provides a long-term picture of blood sugar control, unlike regular blood glucose tests that only show levels at a specific moment.

The HbA1c test is measured as a percentage, indicating what proportion of hemoglobin has glucose attached to it. For people without diabetes, normal HbA1c levels are generally below 5.7 percent. Levels between 5.7 and 6.4 percent indicate prediabetes, a condition where blood sugar is higher than normal but not yet high enough to be classified as diabetes. An HbA1c level of 6.5 percent or higher on two separate tests typically indicates diabetes. For individuals already diagnosed with diabetes, healthcare providers often recommend maintaining HbA1c levels below 7 percent to reduce the risk of complications, though target levels may vary based on individual circumstances.

This test offers several advantages for both diagnosis and ongoing diabetes management. It does not require fasting before the blood draw, making it more convenient than fasting glucose tests. The test is not affected by short-term changes in blood sugar levels caused by stress, illness, or recent meals, providing a more stable and reliable measure of overall glucose control. For people with diabetes, regular HbA1c testing helps evaluate whether treatment plans are working effectively and allows for timely adjustments to medications, diet, or lifestyle changes.

Healthcare providers typically recommend HbA1c testing at least twice a year for people with diabetes who are meeting treatment goals and have stable blood sugar control. Those who have recently changed their treatment plan or are not meeting their glucose targets may need testing more frequently, often every three months. The test is also used as a screening tool for prediabetes and diabetes in adults, particularly those with risk factors such as being overweight, having a family history of diabetes, or leading a sedentary lifestyle. Regular monitoring through HbA1c testing plays a crucial role in preventing or delaying serious diabetes-related complications affecting the eyes, kidneys, nerves, and cardiovascular system.