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

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like muscle weakness, nerve problems, or if you have conditions that affect fat absorption (such as certain gastrointestinal disorders). It may also be used to monitor vitamin E levels in people with long-term medical conditions or those taking supplements.

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 test involves fasting-related conditions. Bring any medications or supplements you’re taking to your appointment.

What the Results Mean

Results are typically reported as a concentration in milligrams per deciliter (mg/dL) or micrograms per milliliter (µg/mL). While reference ranges can vary by lab, low levels may suggest vitamin E deficiency, while very high levels could indicate over-supplementation or certain liver conditions.

Common Conditions Monitored

This test helps diagnose or monitor conditions like vitamin E deficiency, certain neurological disorders, or gastrointestinal diseases that affect fat absorption. It may also be used in research or specialized care for rare genetic disorders.