Vitamins & minerals
Vitamin E
LOINC 1823-4 · mg/L
Ranges
Reference range: 5.5–17 mg/L
What it is
Vitamin E is a fat-soluble antioxidant that helps protect cells from damage and supports immune function.
Why it matters
The test checks vitamin E status, which is rarely deficient but can matter with fat-absorption problems.
What high values can mean
A higher value usually reflects supplements; very high doses can interfere with blood clotting.
What low values can mean
A lower value is uncommon and usually relates to conditions that impair fat absorption.
How to improve it
A varied diet provides enough for most people; supplements should be used cautiously.
Food & lifestyle
Nuts, seeds, vegetable oils and leafy greens are rich in vitamin E.
Preparing for the test
A blood test; fasting may be requested — follow your lab's instructions.
When to talk to a doctor
Discuss an abnormal vitamin E with a doctor, especially before high-dose supplements.
Related markers
Sources
- NIH Office of Dietary Supplements
- MedlinePlus (NIH)
Content reviewed on June 26, 2026
Medical disclaimer
This content is for educational purposes only. It is not medical advice and does not diagnose, treat, or prevent any condition. Reference ranges vary between laboratories — always use the range printed on your report and discuss your results with a healthcare professional.
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