Test Overview

Test Methodology


Test Usage

Monitoring dietary therapy of patients with galactosemia due to deficiency of galactose-1-phosphate uridyltransferase or uridine diphosphate galactose-4-epimerase.

Reference Range*

< or = 0.9 mg/dL

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details

Days Test Performed


Analytic Time

8 - 15 days

Soft Order Code


MiChart Code

Galactose-1-Phosphate, RBC (Sendout)



Galactose-1-Phosphate, Erythrocytes

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Laboratory Reference

Mayo GAL1P (80337)

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Specimen Requirements

Offsite Collection Instructions

For infants, collect specimen immediately prior to feeding to avoid postprandial elevations. Collect blood in a lavender top tube. Send to Specimen Processing refrigerated

Special Handing

Collect specimen in a green top tube. Immediately deliver to Specimen Processing within 15 minutes of collection or see below for processing instructions.

Normal Volume

3 mL whole blood

Minimum Volume

2 mL whole blood

Additional Information

Test sent to Mayo Medical Laboratories

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