HbA1C testing provides information about average blood glucose over which statement is true?

HbA1C testing provides information about average blood glucose over which statement is true?

• A. It measures electrolyte balance.
• B. It measures kidney function.
• C. It measures liver enzymes.
• D. It monitors long-term glucose control in diabetes.

Answer: (D)

HbA1C shows the average blood glucose over the past 2–3 months because glucose attaches to hemoglobin in red blood cells, and these cells live about 120 days. The amount of glycated hemoglobin reflects the overall glucose exposure during that lifespan, not the current or acute levels. This test is specifically used to monitor long-term glucose control in diabetes and to track how well treatment is working over time, regardless of fasting status. It isn’t a measure of electrolytes, kidney function, or liver enzymes, which are assessed by separate tests (electrolyte panels, kidney function tests like creatinine/BUN, and liver enzymes such as AST/ALT).

HbA1C shows the average blood glucose over the past 2–3 months because glucose attaches to hemoglobin in red blood cells, and these cells live about 120 days. The amount of glycated hemoglobin reflects the overall glucose exposure during that lifespan, not the current or acute levels. This test is specifically used to monitor long-term glucose control in diabetes and to track how well treatment is working over time, regardless of fasting status.

It isn’t a measure of electrolytes, kidney function, or liver enzymes, which are assessed by separate tests (electrolyte panels, kidney function tests like creatinine/BUN, and liver enzymes such as AST/ALT).