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Serum or plasma mass concentration of vitamin A (retinol)

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

This test measures the amount of vitamin A, a fat-soluble nutrient essential for vision, immune function, and skin health, in your blood.

Quick summary

["Vitamin A helps protect your eyesight and supports your immune system."]

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

Key facts at a glance

LOINC
72265-2
Short code
FLUBV IgA Ser IA-aCnc
Synonyms
FLUBV IgA Ser IA-aCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ia
CPT
82784
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 check for vitamin A deficiency, which can cause vision problems, weakened immunity, or other health issues. It may also be used to monitor vitamin A levels in people taking supplements or those with certain medical conditions affecting nutrient absorption.

What to Expect During the Test

A small blood sample is drawn from a vein, usually in your arm. You may feel a slight pinch, but it usually doesn’t cause discomfort. The test is quick and typically takes a few minutes.

How the Results Are Interpreted

Results are compared to standard ranges, though exact values can vary by lab. Low levels may indicate deficiency, while very high levels could signal overconsumption or certain medical conditions.

Common Reasons for Testing

This test is often done if you have symptoms like night blindness, frequent infections, dry skin, or if you’re taking supplements that may affect vitamin A levels.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Vitamin A (Retinol) Level

Frequently asked questions

What Does a Low Vitamin A Level Mean?
A low level may suggest you’re not getting enough vitamin A from your diet or supplements. It could also indicate malabsorption issues, such as celiac disease or liver problems, or certain medications that interfere with vitamin absorption.
What Does a High Vitamin A Level Mean?
High levels can sometimes be harmless if due to temporary overconsumption, but chronic high levels may signal liver issues or excessive supplement use. Always discuss results with your healthcare provider.
How Can I Maintain Healthy Vitamin A Levels?
Eat a balanced diet rich in vitamin A, such as leafy greens, carrots, sweet potatoes, and liver. Avoid excessive vitamin A supplements unless directed by your doctor. Regular check-ups can help monitor your levels if you have underlying health conditions.
  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