Specialist marker · Blood sugar
A fructosamine blood test shows your average blood sugar over the last 2 to 3 weeks, compared with 2 to 3 months for HbA1c. It is most useful when HbA1c is unreliable (anaemia, pregnancy, some haemoglobin variants, recent blood loss) or when you want to see the effect of a recent change in diet or medication. Fructosamine is included in TrueVitals Signature (£799).
Sugar in the blood sticks to proteins over time. HbA1c measures sugar stuck to haemoglobin in red cells, which live about three months. Fructosamine measures sugar stuck to blood proteins, mainly albumin, which turn over in a few weeks. So fructosamine reflects a shorter, more recent window.
Signature reads fructosamine with HbA1c, fasting glucose, insulin, C-peptide, adiponectin and albumin. When HbA1c and fructosamine agree, the picture is clear. When they disagree, your report explains which is more likely to be right for you.
| Option | Includes it | Price | What else you get |
|---|---|---|---|
| TrueVitals Signature | Yes | £799 incl. draw | Fructosamine with HbA1c, glucose, insulin, C-peptide and adiponectin among 230 biomarkers. Clinician-reviewed report. |
| TrueVitals Ultimate | No | £399 incl. clinic draw | HbA1c, fasting glucose, insulin, C-peptide and HOMA-IR, but not fructosamine. |
| NHS GP | On request | Free if clinically indicated | Used when HbA1c is unreliable, mainly in diabetes care. |
TrueVitals prices checked 5 November 2026. Every TrueVitals report is clinician-reviewed. Pay in instalments with Klarna or Clearpay. Signature is drawn at one of 70 Randox Health clinics; Ultimate at one of 103 partner clinics or with a home visit.
Not a diagnostic test for diabetes: diabetes is diagnosed in the UK with HbA1c or glucose. Fructosamine is a monitoring and cross-checking tool. If your results suggest diabetes, your GP will confirm it with their own tests.
A private panel is a good way to get a baseline, understand a result in context and track it over time. It does not replace your GP for symptoms, and anything that needs follow-up is flagged in plain words in your report.
No. Ultimate includes HbA1c, fasting glucose, insulin and C-peptide. Fructosamine is included in Signature.
Not in general. HbA1c is the standard. Fructosamine is better when HbA1c is unreliable or when you want to see changes over weeks rather than months.
Labs commonly use a range of about 200 to 285 µmol/L for people without diabetes. Your report uses the lab's own range.
Yes. Because it reflects 2 to 3 weeks, it shows a change sooner than HbA1c, read alongside glucose and insulin.
Fructosamine does not need fasting, but Signature includes fasting glucose and insulin, so an overnight fast with water only is advised.
How this page was written: by James Smillie, founder of TrueVitals, reviewed by the TrueVitals clinical review team, using NHS and laboratory reference sources. Ranges are typical values; your report uses your lab's own ranges. TrueVitals sells the panels named on this page, so we have stated plainly what this test cannot do. Last updated 5 November 2026.
Signature: 230 biomarkers including fructosamine, HbA1c, insulin and adiponectin, £799 including the draw. Clinician-reviewed report.
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