Two-week sugar average Fructosamine
How much sugar has stuck to proteins in your blood over the past two or three weeks.
Also printed asGlycated Albumin · Glycated Serum Protein
What it measures
Sugar stuck to blood proteins over the last two to three weeks.
Gives a shorter view than HbA1c, which matters when red cells are abnormal and HbA1c cannot be trusted.
Why it matters for how long you stay well
Its value is filling the gap the three-month average leaves when iron is low or red cells are unusual, so a sugar problem is not missed for months.
How it shows up in daily life
It gives a shorter look back than the three-month average, which helps when your red cells are not behaving normally.
High and low readings
When it reads high
Sugar has been running high recently.
When it reads low
Low is rarely meaningful on its own.
What moves it
Daily life
- how you ate over the past few weeks
- a low blood protein, which drags it down
Medicines known to shift it
- metformin (lowers it)
- steroids (raise it)
Listed so a result can be read in context. It is not advice to start, stop or change any medicine; that decision belongs with your physician.
Common questions
What does Fructosamine measure?
Sugar stuck to blood proteins over the last two to three weeks. Gives a shorter view than HbA1c, which matters when red cells are abnormal and HbA1c cannot be trusted.
What does a high Two-week sugar average result usually mean?
Sugar has been running high recently.
What does a low Two-week sugar average result usually mean?
Low is rarely meaningful on its own.
What is the usual reference range for Two-week sugar average?
A broad adult reference band is 200–285 µmol/L. Labs differ, so read your result against the band printed on your own report.
Educational only, not a diagnosis. A single number means little without your history and the rest of your panel, so discuss your own results with your physician.
Typical adult reference band
- Adults
- 200–285 µmol/L
Labs differ. The band printed on your own report is the one that applies to your result.
Reported in µmol/L
Ageing relevance
2/5
Relevant to the ageing of one organ, or to disease screening.
Worth knowing
Blood proteins turn over in about two or three weeks, which is why this test looks back that far.
Have a report with this marker on it? Read it in context.
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