Fructosamine (Serum)

What Is Fructosamine Used For?

Fructosamine is primarily used to monitor how well your blood sugar levels have been controlled over time, especially in people with diabetes. Unlike hemoglobin A1c, which measures average glucose over roughly three months, fructosamine gives a snapshot of glycation (protein bonding with glucose) in your most recent blood samples. It’s useful for adjusting treatment plans when immediate glucose trends are unclear.

How Is the Test Performed?

A small blood sample is drawn from your arm. The test measures the concentration of glycated proteins in serum, which is the liquid part of your blood after clotting. Results are typically reported in mass concentration units.

Why Might You Need This Test?

Your healthcare provider may order fructosamine if you have diabetes and need to assess how well your blood sugar management has been consistent. It’s also useful in cases where hemoglobin A1c results are unclear or if you have conditions affecting red blood cell lifespan (e.g., hemolytic anemia).

What Do the Results Mean?

While specific reference ranges vary by lab, fructosamine levels generally reflect your average blood sugar control. Higher levels may indicate poor glycemic control, while lower levels could suggest temporary improvements or conditions affecting protein metabolism.