Vitamin E (tocopherol): normal blood levels, low and high — causes

In shortNormal vitamin E (tocopherol) in blood of adults is 5–18 mg/L (5–18 µg/mL). Deficiency arises with impaired fat absorption and gives neurological symptoms; excess — from supplement overuse — raises bleeding risk. The level is judged together with lipids.

What this marker is

Vitamin E is the main fat-soluble antioxidant: it protects cell membranes from oxidation. Like other fat-soluble vitamins, it is absorbed only with fats and rides lipoproteins.

So low tocopherol is almost always about fat absorption or its carriers (with hypolipidemia the level is “low for technical reasons”), not about diet. It is interpreted together with total cholesterol.

Reference ranges

Group	Reference range
Adults	5–18 mg/L (5–18 µg/mL)
Children	3–15 mg/L — roughly, per the lab report
Interpretation	compare with total cholesterol: the tocopherol/cholesterol ratio

Tocopherol travels on lipoproteins: with low cholesterol it may be “low” without deficiency, with high cholesterol “normal” despite short supply. So the result is read together with the lipid panel. Ranges differ between laboratories.

Check your value

Enter the number from your lab report — see how it compares with the typical range. Mind the units shown in the chosen row.

An approximate comparison with a typical range, not a diagnosis. Ranges differ between laboratories — use the one on your report; a doctor interprets the result.

Units and conversion

Measured in: µmol/L

µmol/L=µg/mL

µg/mL = µmol/L × 0.43 (α-tocopherol, molar mass 430.7)

When it is high or appears: possible causes

Excess supplementsHigh tocopherol doses — bleeding risk, especially with anticoagulants.

High blood lipidsThe level rises with cholesterol without a true excess.

When it is low: possible causes

Impaired fat absorptionCeliac disease, cystic fibrosis, biliary disease, intestinal resections.

AbetalipoproteinemiaA rare inherited absence of fat carriers.

Insufficient nutritionLong-term fat restriction in the diet.

What can skew the result

These factors can shift the result without any disease — keep them in mind before a retest:

SupplementsBlood lipid levelsGI diseaseAnticoagulants

How to prepare

In the morning, fasting (8–12 hours), venous blood. Biotin (vitamin B7) in multivitamins can distort some immunoassays — tell the doctor about supplements. Details: Preparation: venous blood.

When a retest makes sense

Deficiency is confirmed by a repeat test in 2–4 weeks; monitoring during supplements is set by the doctor, usually at 8–12 weeks.

Who usually reviews this result

An out-of-range result is usually reviewed by: Primary care physician, gastroenterologist. Bring your report and any previous results to the visit.

Names used on lab reports

Look for one of these names on your report:
Vitamin ETocopherolTocopherol

Several markers on your report?

The app reads your whole report — this marker together with its neighbors, not one by one.

Get your results explained See an example

Frequently asked questions

Should I take vitamin E “for the skin”?

Without a proven deficiency — no. Excess of fat-soluble vitamins accumulates; tocopherol in high doses raises bleeding risk. Test first, then the doctor.

Vitamin E is low though I eat nuts and oils — why?

Then the cause is not food but fat absorption or transport. The GI tract (celiac, bile) and the lipid panel are checked.

Should vitamins A and E be tested together?

Often yes: both are fat-soluble and depend on one absorption mechanism. A combined panel gives a clearer picture.

Sources

MedlinePlus — Vitamin A test — MedlinePlus (medlineplus.gov). Accessed: September 17, 2026.
MedlinePlus — Vitamin A test — MedlinePlus (medlineplus.gov). Accessed: September 17, 2026.

Vitamin E (tocopherol)