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Metabolites of Retinol (Vitamin A) in Serum or Plasma

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

This test measures certain breakdown products of vitamin A (retinol) in your blood, which can help assess vitamin A status and metabolism.

Quick summary

["This test may be used to evaluate how well your body processes vitamin A and its role in health."]

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

Key facts at a glance

LOINC
34419-2
Short code
Mat Retics NFr
Synonyms
Mat Retics NFr
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms of vitamin A deficiency (such as night blindness or dry skin), suspected liver disease, or if you’re taking medications that affect vitamin A metabolism. It may also be part of a broader evaluation for metabolic or genetic conditions.

What to Expect Before the Test

No special preparation is typically needed. You may fast for 8–12 hours before the test if instructed, but always follow your provider’s instructions. Bring any medications you’re currently taking to your appointment.

What the Test Involves

A blood sample will be drawn from a vein in your arm by a healthcare professional. The sample is sent to a lab for analysis of vitamin A metabolites.

What the Results Mean

Results may indicate normal vitamin A metabolism, potential deficiencies, or metabolic issues. Your provider will interpret the results in the context of your overall health and symptoms.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: This test helps diagnose or monitor conditions like vitamin A deficiency, liver disease, or metabolic disorders affecting retinol processing. Elevated or low metabolite levels may signal underlying health concerns that require further evaluation.

Short name

Vitamin A Metabolite Profile

Frequently asked questions

What does a vitamin A metabolite profile measure?
This test measures specific breakdown products (metabolites) of vitamin A in your blood, such as retinyl palmitate or retinol conjugates, to assess vitamin A status and metabolism.
How long does it take to get results?
Results are typically available within 1–3 business days, depending on lab processing times. Your provider will contact you once results are ready.
Can I eat or drink anything before this test?
Follow your healthcare provider’s instructions, but generally, fasting for 8–12 hours is recommended if specified. Avoid alcohol or certain medications that may affect results.
  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