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Your liver panel is back: what are these 7 lines?
A hepatic function panel, usually called a liver panel, reports seven results: ALT, AST, alkaline phosphatase (ALP), total bilirubin, direct bilirubin, albumin, and total protein. One flagged line is not a diagnosis. Start where your report points:
- ALT or AST flagged: Section 2
- ALP flagged: Section 3
- Bilirubin flagged: Section 4
- Albumin or total protein low: Section 5
- Several lines flagged: Section 6
- Yellow skin or eyes, new confusion, or possible acetaminophen overdose: Section 7, now
The 7 results on a hepatic function panel
| Result | What it reflects | Key Clinical Detail |
|---|---|---|
| ALT | Liver cell injury | Most liver-specific enzyme |
| AST | Liver cell injury | Also found in heart and muscle |
| ALP | Bile flow | Can come from bone |
| Total bilirubin | Waste clearance | Includes direct and indirect |
| Direct bilirubin | Waste clearance | The one result a CMP lacks |
| Albumin | Protein production | Slow to change |
| Total protein | Protein production | Albumin plus globulins |
Source: panel components per Labcorp’s Hepatic Function Panel (7) and the AMA panel definition; descriptions per MedlinePlus, Mayo Clinic, and the NHS Specialist Pharmacy Service.
Liver panel, LFT, CMP: same thing?
“Liver panel,” “hepatic function panel,” and “LFT” usually name the same blood draw. A CMP reports six of the seven in its 14-test metabolic panel, leaving out only direct bilirubin; see all 14 CMP results.
ℹ️ Medical Disclaimer: This article explains how liver panel results are read; it does not interpret your result, diagnose a condition, or advise starting, stopping, or changing any medication, supplement, alcohol use, or test. Review your numbers with your primary care physician, a gastroenterologist, or a hepatologist before acting. If you have yellow skin or eyes, new confusion, or may have taken too much acetaminophen, seek urgent care now.
ALT and AST: what do these two liver enzymes show?
ALT and AST are liver enzymes, and ALT is the more liver-specific of the two.
ALT: the more liver-specific enzyme
🔬 How It Works: ALT is found mostly in the liver (MedlinePlus). When liver cells are damaged, it is released into the bloodstream, so blood levels rise (Mayo Clinic).
AST: why muscle can raise it too
AST also sits in heart and muscle, and the ACG lists strenuous exercise and muscle damage among non-liver causes of raised AST and ALT.
Lab ranges vs the ACG healthy ALT ceilings
MedlinePlus lists ALT at 4–36 U/L; Mayo Clinic, 7–55. The American College of Gastroenterology sets a lower bar:
📊 Clinical Data Point: A true healthy normal ALT is 29–33 IU/L for males and 19–25 IU/L for females; levels above this should be assessed. — Source: Kwo et al., ACG guideline on abnormal liver chemistries, Am J Gastroenterol 2017.
For severity tiers, see what your ALT number means.
✅ Patient Action: Ask your primary care physician: “Is my ALT above the ACG ceiling for my sex, and should we repeat it?”
High ALP on a liver panel: bile ducts or bone?
Alkaline phosphatase comes from the liver and from bone, so a high ALP alone can’t say which.
Why ALP can come from bile ducts or bone
Mayo Clinic says higher ALP may reflect liver disease, such as a blocked bile duct, or bone disease. MedlinePlus says that if liver tests are also high, the liver is the likely source; see why ALP alone can’t show its source.
Can ALP be high without a problem?
Yes. MedlinePlus says higher-than-normal ALP doesn’t always need treatment. The ACG recommends confirming a high ALP with a GGT, which isn’t on this panel.
✅ Patient Action: Ask your primary care physician or a gastroenterologist: “Was a GGT done, and could bone be the source of my ALP?”
Direct vs total bilirubin: the result a CMP doesn’t show
Bilirubin is a waste product of red blood cell breakdown; direct bilirubin is the part the liver has already processed.
Total vs direct bilirubin in plain language
🔬 How It Works: The liver converts unprocessed bilirubin into the “conjugated” (direct) form so it can leave in bile.
The ACG says a high conjugated fraction implies liver cell disease or bile duct blockage in most settings. A CMP shows total bilirubin only; MedlinePlus lists what raises or lowers bilirubin.
When bilirubin is the only flagged result
The ACG calls raised bilirubin with normal ALP, AST, and ALT isolated hyperbilirubinemia and lists Gilbert syndrome among causes of unconjugated elevation. A Journal of Hepatology review calls it a common benign finding; only a clinician can confirm it.
✅ Patient Action: Ask your primary care physician: “Was my direct bilirubin high, and what is causing the rise?”
Low albumin or total protein: what it can and can’t mean
Albumin is a protein the liver makes, and total protein is albumin plus globulins, so both reflect production, not injury.
Albumin: slow to change and not liver-only
Mayo Clinic says low albumin and total protein may mean liver disease but also appear in digestive and kidney conditions. The NHS Specialist Pharmacy Service puts albumin’s half-life at about 20 days and says low albumin with otherwise normal liver tests is unlikely to be of liver origin.
Total protein: albumin plus globulins
Because it combines both, total protein is read beside albumin and your other results.
✅ Patient Action: Ask your primary care physician: “Could a kidney or digestive condition explain my low albumin, and what test would show it?”
How to read all 7 liver panel results as one pattern
A normal liver panel doesn’t always mean a healthy liver, and an abnormal one doesn’t always mean liver disease.
Hepatocellular, cholestatic, and bilirubin-only patterns
| Pattern | Which lines rise | May point toward | Key Clinical Detail |
|---|---|---|---|
| Hepatocellular | AST and ALT, out of proportion to ALP | Liver cell injury | ACG definition |
| Cholestatic | ALP, out of proportion to AST and ALT | Bile duct or bile flow problem | Confirm ALP with GGT |
| Mixed | ALP and AST/ALT both | Overlapping processes | ACG definition |
| Isolated hyperbilirubinemia | Bilirubin only | Check direct fraction | Gilbert syndrome is one cause |
Source: pattern definitions from Kwo, Cohen & Lim, ACG Clinical Guideline, Am J Gastroenterol 2017.
This narrows possibilities; it names no cause. See how the same markers read on a CMP.
Can a normal liver panel still hide liver disease?
Yes. The ACG says a normal ALT may not exclude significant liver disease, and Mayo Clinic notes irregular results don’t always mean liver disease. The ACG starts with a history and physical exam, and recommends repeating the panel or running a clarifying test first.
✅ Patient Action: Ask your primary care physician or a gastroenterologist: “Which pattern do my results form, and should we repeat the panel?”
When liver panel results mean get care today
Most flagged panels lead to a repeat test and a conversation; a few situations shouldn’t wait.
Symptoms that shouldn’t wait
The ACG says acute hepatitis with slow clotting or confusion from liver dysfunction needs immediate referral to a liver specialist. With new confusion, easy bleeding or bruising, or yellow skin or eyes alongside abnormal results, seek care today. Without those, see when repeating the panel makes sense.
✅ Patient Action: Ask urgent care: “Could this be acute liver injury, and do I need a clotting test today?”
If acetaminophen overdose is possible
⚠️ Clinical Warning: Suspect too much acetaminophen? Get medical help or call Poison Help at 1-800-222-1222 right away. The FDA warns severe liver damage may occur with three or more alcoholic drinks a day while using it; see its guidance on acetaminophen safety.
Liver panel results: common questions
1. What tests are on a liver panel?
A liver panel reports seven results: ALT, AST, ALP, total bilirubin, direct bilirubin, albumin and total protein.
2. Is a liver panel the same as a CMP?
No. A CMP reports six of the same liver results but omits direct bilirubin, which this panel adds.
3. What is a normal range for liver panel results?
Your lab’s printed range applies. MedlinePlus lists ALT at 4–36 U/L, while Mayo Clinic lists 7–55 U/L.
4. What do high ALT and AST mean?
ALT and AST rise when liver cells release them, and AST can also come from muscle. Ask your clinician which applies.
5. What does a high ALP mean on a liver panel?
High ALP can come from bile ducts or bone, so other results help show which. Ask your clinician about a GGT.
6. What is the difference between direct and total bilirubin?
Total bilirubin is all bilirubin; direct (conjugated) bilirubin is the part the liver has processed. A CMP reports only total.
7. Can bilirubin be high with normal liver enzymes?
Yes. The ACG calls this isolated hyperbilirubinemia, and Gilbert syndrome is one listed cause. Ask your clinician whether direct bilirubin was high.
8. What does low albumin on a liver panel mean?
It may reflect liver disease, but kidney and digestive conditions also lower it. Ask your clinician which test settles the cause.
9. Can I have liver disease with normal liver panel results?
Yes. The ACG says a normal ALT may not exclude significant liver disease. Ask your clinician whether other testing fits your risks.
10. Do abnormal liver panel results always mean liver disease?
No. Mayo Clinic notes irregular results don’t always mean liver disease. Ask your clinician whether to repeat the panel.
11. When are liver panel results an emergency?
Seek care today if abnormal liver results come with new confusion, easy bleeding or bruising, or yellowing skin or eyes.
Your next step after a liver panel
Bring three questions to your clinician: which of my seven lines are flagged and by how much, was direct bilirubin measured, and should we repeat the panel before more tests? Write each result beside your lab’s printed range in our free Liver Panel Result Tracker.
About this content
How this article was put together: researched from recognised health sources, drafted with the help of AI tools, and edited by hand, with sources linked throughout.
Sameer Patel is the founder and editor of My Medicine Advisor. He is not a doctor or medical professional — before starting this site he worked in banking,…
Medical disclaimer
The content on MyMedicineAdvisor is provided for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Health information on this website should not be used to diagnose, treat, cure, or prevent any condition without guidance from a qualified healthcare professional. Always seek the advice of your doctor, physician, or another licensed healthcare provider with any questions you may have regarding a medical condition, symptoms, medications, or treatment decisions.
