Dry Eyes and Mouth Lasting Over 3 Months May Signal Sjögren's Disease

Hemoglobin A1c, commonly known as HbA1c or glycated hemoglobin, is a crucial blood test that measures average blood sugar levels over the past two to three months. This test works by detecting the amount of glucose that has attached to hemoglobin, the oxygen-carrying protein in red blood cells. Since red blood cells live for approximately three months, the HbA1c test provides a longer-term picture of blood glucose control compared to daily blood sugar measurements. Healthcare providers primarily use this test to diagnose diabetes and prediabetes, as well as to monitor how well people with diabetes are managing their condition.

The HbA1c test offers several advantages over traditional fasting blood glucose tests. Patients do not need to fast before the test, and it can be performed at any time of day, making it more convenient. The test results are reported as a percentage, with higher percentages indicating higher average blood sugar levels. For people without diabetes, a normal HbA1c level is typically below 5.7 percent. A level between 5.7 and 6.4 percent indicates prediabetes, suggesting an increased risk of developing type 2 diabetes. An HbA1c level of 6.5 percent or higher on two separate tests indicates diabetes.

For individuals already diagnosed with diabetes, the HbA1c test serves as an important monitoring tool. Most diabetes treatment plans aim for an HbA1c target of less than 7 percent, though individual goals may vary based on age, overall health, and other factors. Regular HbA1c testing, typically every three to six months, helps patients and healthcare providers assess whether current treatment strategies are effective or need adjustment. Maintaining HbA1c levels within the target range significantly reduces the risk of diabetes-related complications such as nerve damage, kidney disease, eye problems, and cardiovascular issues.

It is important to note that certain conditions can affect HbA1c test accuracy. Factors such as anemia, recent blood loss, blood transfusions, certain hemoglobin variants, kidney disease, and liver disease may influence results. Pregnant women and people with certain genetic conditions affecting hemoglobin may require alternative testing methods. Despite these limitations, the HbA1c test remains one of the most valuable tools in diabetes care, providing essential information that helps guide treatment decisions and improve long-term health outcomes for millions of people worldwide.