Serum or Plasma Free Hepatic Enzyme Activity (Generalized Liver Function Screening)
This test measures the activity of enzymes naturally released into your blood when your liver or other organs are stressed or damaged. It helps assess overall liver health and detect early signs of liver-related issues.
["Enzymes in your blood can signal liver or organ strain—early detection may prevent complications."]
Key facts at a glance
- LOINC
- 60628-5
- Short code
- FH-SeGn Skull XR
- Synonyms
- FH-SeGn Skull XR
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- xr-measured
- 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
This test evaluates the activity of enzymes (proteins that speed up chemical reactions) produced by your liver and other organs. Elevated levels may indicate inflammation, infection, or damage to these tissues. The test does not specify which enzyme is elevated but provides a general overview of organ function.
Why It’s Done
Doctors may order this test to monitor liver health before or after treatments, screen for liver disease, or investigate symptoms like fatigue, jaundice, or abdominal pain. It can also be part of routine check-ups for high-risk individuals.
Common Causes of Abnormal Results
Results may be higher in conditions like hepatitis, fatty liver disease, alcohol use, or certain medications. Lower-than-normal results are less common but could suggest liver reserve issues or specific metabolic disorders.
What to Expect Before the Test
You’ll provide a blood sample, usually drawn from your arm. No special preparation is needed, but inform your provider about medications or recent illnesses that might affect results.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
This test provides a broad indicator of liver and organ stress but isn’t diagnostic alone. Doctors may combine it with other tests (like liver function panels) for a full assessment. Early detection of abnormalities can guide treatment decisions.
Frequently asked questions
Will this test show if I have liver disease?
What does a high or low result mean?
Can I eat or drink before this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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 16, 2026. · Read our editorial policy