Fructosamine

Fructosamine test assesses the level of fructosamine, a compound that is formed when glucose combines with protein, in the blood. Just like HbA1C, this test helps to determine glycemic control in diabetic patients over a span of 2 to 3 weeks. It is the best test to assess effectiveness of diet or medication after a few weeks rather than months.

Unlike HbA1c which measures the average blood glucose level over 2 to 3 months, serum proteins are present in the blood for about 14 to 21 days (2 to 3 weeks). This test is used when A1c test cannot be used and/or a shorter-term monitoring window is required such as those with shortened RBC lifespan or abnormal forms of hemoglobin.