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Galactose and Creatinine, Urine — Mass Ratio

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

Measures urine galactose relative to creatinine, which helps evaluate sugar exposure and monitor conditions that affect galactose metabolism.

Quick summary

["This test helps assess urinary galactose while accounting for how concentrated the urine is."]

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

Key facts at a glance

LOINC
13744-8
Short code
Galactose/Creat Ur
Synonyms
Galactose/Creat Ur
Category
kidney
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What is this test?

This test measures the amount of galactose in urine relative to the amount of creatinine. The ratio helps account for variations in urine concentration.

Why might I need this test?

It may be used to monitor people with galactosemia or related disorders of galactose metabolism. It can also help assess how much galactose from the diet is appearing in the urine.

How is the test performed?

A urine sample is collected and tested in a laboratory to determine the amounts of galactose and creatinine. The laboratory then calculates their ratio.

How do I prepare for the test?

Follow your clinician's instructions about when and how to collect urine. You may be asked to avoid certain foods or drinks for a specified period, and you should not change your diet unless instructed.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Urine Galactose/Creatinine Ratio

Frequently asked questions

What does the galactose-to-creatinine ratio show?
It shows how much galactose is present in the urine relative to creatinine. This provides a more useful measure than urine galactose alone when urine concentration varies.
Is this the same as a urine glucose test?
No. This test specifically measures galactose, which is a different sugar from glucose, although both are carbohydrates and may be discussed together in some conditions.
What should I do if my result is high?
Contact your healthcare professional to review the result. Do not make major dietary or medication changes on your own because interpretation may depend on your diagnosis, diet, and other test 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