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Serum or plasma mass concentration of bile acids

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

This test measures the amount of bile acids in your blood, which helps assess liver function and bile flow.

Quick summary

["Bile acids support digestion and can indicate liver or gallbladder health."]

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

Key facts at a glance

LOINC
38595-5
Short code
EDB Air-mCnc
Synonyms
EDB Air-mCnc
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 Is This Test Done?

Your healthcare provider may order this test to evaluate liver disease, bile duct blockages, or metabolic disorders. It can also help diagnose conditions like primary biliary cholangitis or pruritus (itching) related to bile acid malabsorption.

What to Expect Before the Test

No special preparation is needed unless instructed. You may fast for 8–12 hours before the blood draw if your lab requires it, but check with your provider first.

How the Test Works

A small blood sample is taken from a vein, usually in your arm. The sample is analyzed to measure bile acid levels using a sensitive laboratory method.

What the Results Mean

Higher-than-normal levels may suggest liver disease, bile duct issues, or metabolic disorders. Lower-than-normal levels could indicate malabsorption or other gastrointestinal problems.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test helps diagnose or monitor conditions affecting bile production, liver function, or digestion. Elevated levels may indicate cholestasis (blocked bile flow), cirrhosis, or certain metabolic syndromes. Low levels may signal malabsorption syndromes or rare genetic disorders.

Short name

Bile Acid Level

Frequently asked questions

How often will I need this test?
Your provider will determine frequency based on your symptoms, diagnosis, or ongoing treatment. Some patients need it monthly, while others may only need it once.
What are common causes of abnormal bile acid levels?
Abnormal results may stem from liver disease (e.g., hepatitis, cirrhosis), bile duct obstructions, metabolic disorders (e.g., cystic fibrosis), or medications that affect bile flow.
Can diet affect bile acid test results?
Yes, certain foods (e.g., high-fat meals) or supplements may temporarily influence bile acid levels. Follow your provider’s instructions regarding dietary restrictions.
  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