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Glycated Serum Protein (or Glycated Plasma Protein) Concentration

Published: August 9, 2026Updated: August 16, 2026

This test measures the level of proteins in your blood that have been chemically linked to sugar (glycated), reflecting long-term exposure to blood sugar levels.

Quick summary

["Helps assess how well your body’s sugar control has been over time."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
79617-7
Short code
Gly-pro SerPl-sCnc
Synonyms
Gly-pro SerPl-sCnc
Category
glucose
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What This Test Measures

Glycated proteins are formed when sugars (like glucose) bind to proteins in your blood. This test quantifies the concentration of these glycated proteins, which can indicate average blood sugar levels over weeks or months.

Why It’s Done

Doctors may order this test to monitor blood sugar control in people with diabetes or prediabetes, especially if other tests like HbA1c are unavailable or if additional context is needed.

How It’s Performed

A blood sample is taken from a vein (usually in your arm). The sample is processed to measure the glycated protein concentration using a specialized laboratory method.

What to Expect Before the Test

No special preparation is typically required, but you may be asked to fast for a few hours if your doctor specifies it. Avoid smoking or consuming caffeine right before the draw.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Glycated Protein

Frequently asked questions

Why might my doctor recommend this test?
Your doctor may suggest this test if they want to assess your blood sugar control over time, especially if you have diabetes or prediabetes and need additional monitoring beyond standard tests.
How does this test differ from HbA1c?
Unlike HbA1c, which specifically measures hemoglobin’s glycation (a red blood cell–based test), this test measures glycated proteins in general. Both are useful but measure different aspects of blood sugar history.
Can I fast before this test?
Check with your doctor first—some tests may require fasting, but others do not. Follow their instructions to ensure accurate results.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy