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Lysine concentration in serum

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

This test measures the amount of lysine, an essential amino acid, in your blood serum. Lysine helps with muscle repair, immune function, and calcium absorption.

Quick summary

["Lysine levels can help diagnose or monitor conditions affecting amino acid metabolism or kidney function."]

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

Key facts at a glance

LOINC
27195-7
Short code
OH-Lysine Amn-sCnc
Synonyms
OH-Lysine Amn-sCnc
Category
chemistry
Sample
fluid
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
2-5 mL
Stability
Room temperature: 2h, Refrigerated: 24h
Hemolysis max
300
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like muscle weakness, high blood pressure, or kidney issues. It could also be part of a broader evaluation for metabolic disorders or nutritional deficiencies.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for a few hours before the blood draw. Avoid smoking or strenuous activity right before testing.

What Happens During the Test

A healthcare professional will draw blood from a vein in your arm. The process is quick and typically painless. The sample is then sent to a lab for analysis.

What the Results Mean

Results are compared to standard reference ranges for lysine in serum. Abnormal levels may indicate underlying health concerns, such as kidney disease or certain genetic disorders.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Elevated lysine levels may suggest kidney dysfunction or certain metabolic conditions, while very low levels could indicate malnutrition or disorders affecting amino acid metabolism. Always discuss results with your provider for personalized interpretation.

Short name

Serum Lysine Level

Frequently asked questions

How long does it take to get my test results?
Results are typically available within 1–3 business days, depending on lab processing times. Your healthcare provider will contact you once they are ready.
Can diet affect my lysine test results?
Dietary changes to lysine-rich foods (e.g., meat, dairy, legumes) may temporarily influence results. Avoid extreme dietary shifts before testing to ensure accurate measurements.
Is fasting required for this test?
No fasting is required, but eating or drinking (except water) before the blood draw may affect results. Follow your provider’s specific instructions if given.
  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