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Serum or plasma concentration of vitamin E (alpha-tocopherol)

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

This test measures the amount of vitamin E, a fat-soluble antioxidant found in your blood. Low levels may indicate poor absorption, certain medical conditions, or dietary deficiencies.

Quick summary

["Vitamin E helps protect cells from damage and supports immune function; low levels may signal underlying health concerns."]

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

Key facts at a glance

LOINC
47437-9
Short code
EBV EA-R Ab Ser Ql
Synonyms
EBV EA-R Ab Ser Ql
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 doctor may order this test to check for vitamin E deficiency, especially if you have symptoms like muscle weakness, nerve problems, or frequent infections. It can also help diagnose conditions affecting fat absorption, such as cystic fibrosis or certain gastrointestinal disorders.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for 8–12 hours before the blood draw if your lab uses a specific method. Avoid taking vitamin E supplements for a few days before testing if instructed.

What Happens During the Test?

A healthcare provider will draw blood from a vein in your arm. You may feel a slight pinch, but the process is quick. The blood sample is then sent to a lab for analysis.

What Are Possible Results?

Results are reported as a concentration of vitamin E in the blood, measured in milligrams per deciliter (mg/dL). Your doctor will compare your result to a reference range appropriate for your age and health status.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Vitamin E Level

Frequently asked questions

What does a low vitamin E level mean?
Low levels may indicate vitamin E deficiency, which can cause nerve damage, muscle weakness, or an increased risk of infections. It can also be linked to conditions like celiac disease, pancreatitis, or malabsorption syndromes. Your doctor may recommend dietary changes, supplements, or further testing to identify the cause.
What does a high vitamin E level mean?
High levels are less common but may occur with certain medications, liver disease, or genetic disorders. If your results are elevated, your doctor will investigate potential causes, such as overconsumption of vitamin E supplements or underlying metabolic issues.
How often should I get this test?
This test is typically ordered as needed, often when symptoms or risk factors suggest a deficiency. Your doctor will determine how often to repeat it based on your health status and any treatments you’re receiving.
  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