Which test is commonly used to monitor diabetes?

The Hemoglobin A1c Test is the standard test used to monitor diabetes. This test measures the average blood glucose levels over the past two to three months by assessing the percentage of hemoglobin molecules that are glycated, or bound to glucose. A higher A1c percentage indicates poor blood glucose control over time, which is critical for managing diabetes.

In contrast, the other tests listed do not specifically evaluate long-term blood sugar levels. Thyroid Function Tests assess the performance of the thyroid gland, which can influence metabolism but are unrelated to blood glucose monitoring. The Basic Metabolic Panel provides information about overall metabolic status, including electrolyte balance and kidney function, but it does not focus on diabetes. The C-reactive Protein Test reflects inflammation in the body and may indicate infections or chronic diseases, but it does not provide information on blood glucose levels or diabetes management. Thus, the Hemoglobin A1c Test is explicitly designed for tracking diabetes management, making it the most appropriate choice.