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Proline in Serum (Mass Concentration)

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

This test measures the amount of proline, an essential amino acid, in your blood serum. Proline helps maintain healthy skin, connective tissues, and collagen production.

Quick summary

["Understanding your proline levels may help assess protein metabolism or connective tissue health."]

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

Key facts at a glance

LOINC
2843-1
Short code
Proline CSF-mCnc
Synonyms
Proline CSF-mCnc
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms related to amino acid disorders, collagen-related conditions, or if they suspect metabolic issues affecting protein synthesis. It could also be part of a broader evaluation for genetic disorders or nutritional deficiencies.

What to Expect Before the Test

No special preparation is typically required. You may be asked to fast for 8–12 hours before the test if instructed by your provider. Bring any medications or supplements you’re currently taking to your appointment.

During the Test

A healthcare professional will draw blood from a vein in your arm. The process is quick and usually painless. You may feel slight discomfort, but it should resolve quickly.

What the Results Mean

Results are interpreted by your healthcare provider based on your clinical picture, symptoms, and other test results. Abnormal levels may indicate metabolic disorders, nutritional deficiencies, or conditions affecting tissue repair.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Serum Proline Level

Frequently asked questions

What causes abnormal proline levels?
Abnormal proline levels can result from metabolic disorders (e.g., amino acid imbalances), nutritional deficiencies, or conditions affecting collagen synthesis. Rarely, genetic disorders may also influence these levels.
How is this test different from other amino acid tests?
Unlike broader amino acid panels, this test specifically measures proline, an amino acid critical for skin, cartilage, and collagen production. It’s often used in specialized evaluations rather than routine screening.
Can diet affect proline levels?
Yes, diet may influence proline levels indirectly. Foods rich in protein (e.g., meat, dairy) can impact amino acid availability, but direct dietary changes to test proline are uncommon unless part of a metabolic workup.
  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