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Hexosaminidase activity in serum/plasma

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

This test measures the activity level of hexosaminidase enzymes in your blood, which can help identify certain genetic conditions.

Quick summary

["Hexosaminidase activity may be checked to diagnose inherited enzyme deficiencies like Tay-Sachs disease."]

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

Key facts at a glance

LOINC
1956-2
Short code
Hexosaminidase A SerPl-cCnc
Synonyms
Hexosaminidase A SerPl-cCnc
Category
chemistry
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

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like developmental delays, vision problems, or neurological issues in children, or if there’s a family history of genetic disorders affecting enzyme function.

What to Expect Before the Test

No special preparation is needed. You’ll typically have a small needle inserted into your arm to draw blood. If you’re a child, a nurse may use a special device to collect blood from your heel.

What the Test Results Mean

Results are usually reported as a ratio or relative activity level compared to a standard. Abnormal results may indicate an enzyme deficiency that requires further evaluation by a genetic specialist.

Common Conditions Monitored

This test is primarily used to screen for inherited metabolic disorders, such as Tay-Sachs disease, Gaucher disease, or other lysosomal storage disorders where hexosaminidase plays a critical role.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Hexosaminidase Activity

Frequently asked questions

What causes abnormal hexosaminidase activity?
Abnormal results are most commonly due to genetic mutations that impair enzyme function. These mutations can be inherited from parents and are often linked to conditions like Tay-Sachs disease or other lysosomal storage disorders.
How is this test different from other enzyme tests?
Unlike many other enzyme tests that measure specific protein levels, hexosaminidase activity tests assess the overall functional capacity of these enzymes in your bloodstream, which can provide broader insights into metabolic health.
Can lifestyle changes affect hexosaminidase activity?
There are no known lifestyle factors that significantly alter hexosaminidase activity. This test is primarily used for genetic screening and diagnosis, not routine monitoring of daily habits.
  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