Serum Fructosamine

Why This Test Matters

Unlike hemoglobin A1c, which measures blood sugar over roughly 3 months, fructosamine gives a snapshot of recent glucose exposure. It’s useful for monitoring treatment in people with diabetes who may have frequent blood sugar fluctuations or certain blood disorders that affect hemoglobin stability.

How It Works

Fructosamine levels rise when blood sugar is consistently high because glucose attaches to proteins in your blood. The test detects these glycated proteins using an immunoassay method, providing a direct measure of your body’s average glucose exposure over a shorter timeframe.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample drawn from a vein, similar to other routine blood tests. Results are typically reported in mass concentration units (mg/dL or µmol/L).

What the Results Mean

Higher fructosamine levels often indicate poor blood sugar control, particularly in people with diabetes. Lower levels may suggest consistently lower glucose levels, though this isn’t always the case. Always discuss results with your healthcare provider to interpret them in the context of your overall health.