Bgalactosidasebldccnc
A blood test that measures the activity of the beta-galactosidase enzyme, which helps break down certain sugars in your body.
{"Measures beta-galactosidase enzyme activity in blood","Helps diagnose certain metabolic and lysosomal storage disorders","Involves a simple blood draw from a vein","Results help doctors evaluate how your body processes certain carbohydrates","May be used to monitor certain genetic conditions"}
Key facts at a glance
- LOINC
- 16454-1
- Short code
- BGAL
- Synonyms
- B-Galactosidase Bld-cCnc
- Category
- chemistry
- Sample
- whole-blood
- Container
- Heparin (green-top) or ACD (yellow-top) anticoagulated tube; sodium heparin preferred for leukocyte isolation
- Units
- N/A
- Ref low
- 3.5
- Critical range
- 0.35 N/A – —
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 0–99 years
- Method
- Fluorometric enzymatic assay using artificial substrate (typically 4-methylumbelliferyl-β-D-galactopyranoside)
- CPT
- 82657
- SNOMED
- 102724008
- Specimen volume
- 5-10 mL whole blood (minimum 3 mL for pediatric patients)
- Stability
- Ambient: 4 hours; Refrigerated (2-8°C): 24 hours; Do not freeze whole blood. Isolated leukocytes stable at -80°C for up to 30 days.
- Hemolysis max
- 50
- Lipemia max
- 100
- Icterus max
- 50
- TAT
- 24–168 hours
- Order
- routine
What is this test?
The beta-galactosidase blood test measures how much of the beta-galactosidase enzyme is present and how active it is in your blood. Beta-galactosidase is an enzyme that helps your body break down specific types of sugar molecules called beta-galactosides. This enzyme is found in cells throughout your body, particularly in structures called lysosomes that act as recycling centers for cells.
Why do I need this test?
Your doctor may order this test if they suspect you have a condition that affects how your body produces or uses beta-galactosidase. This may include certain lysosomal storage disorders, metabolic conditions, or in some cases, to help evaluate certain types of cancer or inflammatory conditions. The test helps doctors understand how well your body's enzyme systems are working.
How is the test done?
A healthcare professional will draw a small sample of blood from a vein in your arm using a needle. The blood sample is then sent to a laboratory where technicians measure the activity level of the beta-galactosidase enzyme. The entire process only takes a few minutes, and you can usually return to your normal activities immediately after the blood draw.
How to prepare for the test?
In most cases, no special preparation is needed for this test. You can eat and drink normally before the blood draw. However, always follow any specific instructions your doctor gives you. Tell your doctor about any medications or supplements you are taking, as some substances may affect test results.
Reference range
Normal range varies by laboratory; generally ≥100 nmol/h/mg protein or ≥3.5 nmol/h per leukocyte. Results should be interpreted in conjunction with clinical findings and other diagnostic markers.N/A
No fasting required. Avoid recent blood transfusions (within 60-90 days) as donor leukocytes may interfere with enzymatic activity measurements. Inform laboratory of any medications or supplements being taken.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Frequently asked questions
Does the test hurt?
How long does it take to get results?
What do abnormal results mean?
Can children have this test?
Sources
- 1
- 2
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.
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 15, 2026. · Read our editorial policy