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Vitamin E (alpha-tocopherol) concentration in serum/plasma

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

This test measures the amount of vitamin E, a fat-soluble antioxidant, in your blood. Vitamin E helps protect cells from damage caused by free radicals.

Quick summary

["Vitamin E supports cell health and immune function; low levels may indicate deficiencies or health concerns."]

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

Key facts at a glance

LOINC
31371-8
Short code
EBV EA IgG CSF-aCnc
Synonyms
EBV EA IgG CSF-aCnc
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
82784
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

Why Might You Need This Test?

Your doctor may order this test if you have symptoms like muscle weakness, nerve problems, or skin issues that could be linked to low vitamin E levels. It may also be used to monitor conditions like certain genetic disorders or malabsorption problems that affect nutrient absorption.

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 doctor specifies. Wear comfortable clothing and plan to stay near the testing site for about 15 minutes.

What Happens During the Test?

A healthcare professional will draw blood from a vein in your arm. You may feel a slight pinch, but it typically doesn’t cause significant discomfort. The blood sample will be sent to a lab for analysis using a sensitive immunoassay method to measure vitamin E levels.

What the Results Mean

Results are compared to a general reference range for healthy adults. Low levels might suggest vitamin E deficiency, while very high levels could indicate certain medications or conditions. Always discuss your results with your doctor.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Vitamin E level

Frequently asked questions

What Are Common Causes of Low Vitamin E Levels?
Low vitamin E levels can result from malabsorption issues (like celiac disease or Crohn’s), certain genetic disorders, liver disease, or long-term use of certain medications. Symptoms of deficiency may include muscle pain, vision problems, or fatigue.
What Are Common Causes of High Vitamin E Levels?
Elevated vitamin E levels are less common but can occur with certain medications (like antacids or cholesterol-lowering drugs) or rare genetic conditions. High levels alone usually don’t cause symptoms unless very severe.
How Often Should I Get This Test?
Your doctor will determine the frequency based on your health status, symptoms, or treatment plan. Regular monitoring may be needed if you have conditions affecting nutrient absorption or long-term vitamin E supplementation.
  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