Vitamin E (Alpha-Tocopherol)
A blood test measuring vitamin E levels to assess antioxidant status and detect potential deficiency or toxicity. Vitamin E acts as an antioxidant protecting cells and supports nerve and muscle function.
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Lab testing services linked from this site are not available to residents of Alaska, Arizona, or Hawaii, unless otherwise noted on the lab's own website.
This publication is not intended to solicit the purchase of laboratory testing from any individual consumer.
What this test measures
This test measures the blood concentration of alpha-tocopherol, the most biologically active form of vitamin E. Alpha-tocopherol is the form the liver preferentially selects for distribution throughout the body after the small intestine absorbs the various vitamin E forms present in food. It functions primarily as a fat-soluble antioxidant, protecting cell membranes from damage caused by free radicals, and it also supports nerve and muscle function, immune defense, and healthy blood clotting.
Most people obtain sufficient vitamin E from dietary sources including vegetable oils, nuts, seeds, avocados, and green leafy vegetables. Deficiency is uncommon in healthy individuals but can occur in people with fat-absorption disorders, certain genetic conditions, or very restrictive diets. Excess vitamin E, typically from high-dose supplementation rather than food sources, can also pose health risks, particularly by interfering with blood clotting. This test helps healthcare providers determine whether alpha-tocopherol levels are within the range needed for normal cellular protection and function.
Who should consider this test
You might consider this test if you are experiencing any of the following:
- Individuals with symptoms suggestive of vitamin E deficiency, including muscle weakness, coordination problems, vision difficulties, or neurological symptoms such as numbness and tingling in the arms and legs.
- Those with conditions that affect fat absorption, such as Crohn's disease, cystic fibrosis, celiac disease, chronic cholestasis, or short bowel syndrome, as these disorders may impair vitamin E absorption.
- People taking high-dose vitamin E supplements who want to monitor their levels and ensure they are not experiencing toxicity, which can interfere with blood clotting and increase bleeding risk.
- Patients with unexplained neurological symptoms including ataxia (loss of coordination), muscle weakness, or visual problems that healthcare providers suspect may be related to nutritional deficiency.
- Individuals with chronic liver disease or pancreatic disorders that may affect the absorption or metabolism of fat-soluble vitamins like vitamin E.
- Those following extremely low-fat diets or with suspected malabsorption disorders who may be at risk for deficiencies in fat-soluble vitamins.
What to expect
Preparation
Fast for 8-12 hours before the test, avoiding all food and beverages except water. If taking vitamin E supplements, consider stopping them 24 hours before testing as recommended by your healthcare provider.
Sample Type
A blood sample is drawn from a vein in your arm using a small needle. The process typically takes just a few minutes with minimal discomfort.
Collection
A healthcare professional will clean the injection site, insert a needle into your vein, and collect the blood sample in a special tube. The sample may need protection from light during processing.
Turnaround
Results are typically available within 2-5 business days and will be securely delivered through your online patient portal.
Understanding your results
Normal serum alpha-tocopherol levels generally fall between 5.5 and 17.0 mg/L, though reference ranges may vary between laboratories. Because vitamin E is transported in the bloodstream by lipoproteins, individuals with very high or very low cholesterol levels may show vitamin E values that are influenced by their lipid status rather than their true tissue stores. Healthcare providers consider lipid levels, dietary intake, symptoms, and any conditions affecting fat absorption when interpreting results.
| Population | Reference Range | Notes |
|---|---|---|
| Adults | 5.5-17 mg/L | Normal range for most healthy adults |
Reference ranges may vary by laboratory and individual factors. Results should be interpreted by a healthcare provider in the context of your overall health.
What does a “Low” result mean?
Low vitamin E levels suggest deficiency, which can cause nerve and muscle damage resulting in loss of feeling in the arms and legs, loss of body movement control, muscle weakness, and vision problems. Another sign of deficiency is a weakened immune system. Early deficiency may show symptoms like decreased reflexes, reduced night vision, and loss of vibratory sense, while more advanced deficiency can cause limb and trunk coordination problems and severe muscle weakness. Treatment typically involves vitamin E supplementation and addressing any underlying absorption disorders.
What does a “High” result mean?
High vitamin E levels typically indicate excessive intake, usually from high-dose supplements rather than dietary sources. Elevated levels can interfere with blood clotting and may cause increased bleeding, as well as gastrointestinal issues such as nausea, diarrhea, and abdominal pain. If results show high levels, healthcare providers typically recommend discontinuing vitamin E supplements and monitoring for symptoms.
Privacy & confidentiality
All vitamin E test results are confidential and protected under HIPAA regulations. Results are delivered securely through your patient portal and are not shared with insurance companies or added to your medical records without your consent. No doctor visit required --- testing can be completed privately and conveniently.
Frequently asked questions
Related tests
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Another important fat-soluble vitamin often tested alongside vitamin E
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Comprehensive nutritional assessment often includes multiple vitamin levels
View TestLipid Panel
Fat metabolism assessment relevant to fat-soluble vitamin absorption
View TestLiver Panel
Liver function affects vitamin E metabolism and storage
View TestLast reviewed: April 2026
CPT Code: 84446
This test may not be available in: NY, NJ, RI
This page is for informational purposes only and does not constitute medical advice. Always consult with a healthcare provider regarding any health concerns. LevelPanel does not diagnose, treat, or prescribe.
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LevelPanel has no business or affiliate relationship with Quest or LabCorp. These links are provided as a public service.
Lab testing services linked from this site are not available to residents of Alaska, Arizona, or Hawaii, unless otherwise noted on the lab's own website.
This publication is not intended to solicit the purchase of laboratory testing from any individual consumer.
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