Low hemoglobin A1C: interpreting the result

Understand the connection

A1C reflects glucose attached to red blood cells over time. A low result can indicate lower average glucose, but it can also occur when red blood cells do not survive as long as expected.

Follow the pathway

Dr. Purser discusses hemolysis, blood loss, transfusion, and other changes in red-cell turnover alongside true hypoglycemia. Kidney or liver conditions and certain medicines can also complicate interpretation.

Bring these questions to your visit

Ask whether glucose measurements agree with A1C and whether blood counts or another marker such as fructosamine would help. Recurrent symptoms of low blood sugar need an assessment rather than reassurance based on A1C alone.