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99-MAAI-V (99-MAAI Vitamin) – Quantitative Measurement of Vitamin A Metabolite in Serum/Plasma

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

This test measures levels of vitamin A metabolites in your blood, which can help assess vitamin A status and its role in vision, immune function, and cell growth.

Quick summary

["This test helps check if you have enough vitamin A or if levels are too low, which may affect your health."]

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

Key facts at a glance

LOINC
44141-0
Short code
NM Liver+Spleen Views W Tc99mMAA IV
Synonyms
NM Liver+Spleen Views W Tc99mMAA IV
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
nm
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 This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like night blindness, frequent infections, dry skin, or if you’re at risk for vitamin A deficiency due to diet, liver disease, or certain medications. It may also be used in research or specialized clinical settings to monitor vitamin A metabolism.

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 if your provider specifies. Bring any medications or supplements you’re taking to your appointment.

What the Test Involves

A healthcare professional will draw blood from a vein in your arm. The blood sample will be sent to a lab for analysis. The test measures the concentration of vitamin A metabolites in your serum or plasma.

What the Results Mean

Results are typically reported as a numerical value representing the concentration of vitamin A metabolites in your blood. Your provider will interpret these results in the context of your overall health and symptoms.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Vitamin A Metabolites and Health

Short name

Vitamin A Metabolite Level

Frequently asked questions

What does my vitamin A metabolite level tell me about my health?
Low levels may indicate vitamin A deficiency, which can weaken your immune system, impair vision, or cause skin issues. High levels could signal liver problems or other metabolic conditions. Your provider will discuss these findings with you based on your medical history and symptoms.
How often should I get this test?
This test is not routinely recommended for most people. It may be ordered periodically if you have known liver disease, certain genetic conditions, or if you’re being treated for vitamin A-related disorders. Follow your healthcare provider’s guidance.
Can I take vitamin A supplements before the test?
It’s best to avoid taking large doses of vitamin A supplements or certain medications (like beta-carotene) for a few days before the test to get an accurate reading. Always check with your provider first.
  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