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

Why Is This Test Done?

Your healthcare provider may order this test if you have symptoms of vitamin E deficiency, such as nerve problems, muscle weakness, or vision issues. It may also be checked in people with certain genetic disorders, malabsorption conditions (like celiac disease), or long-term fat malabsorption. Additionally, it could be part of a broader nutritional assessment or monitoring for conditions affecting fat-soluble vitamins.

What Does a Low or High Level Mean?

Low levels of vitamin E might suggest poor absorption, certain genetic disorders, or long-term dietary deficiencies. High levels could indicate liver disease, certain medications, or excessive vitamin E intake from supplements.

How Is the Test Performed?

A blood sample is taken from a vein in your arm. The sample is sent to a lab where it is analyzed to measure the concentration of vitamin E. The test typically requires fasting, but this may vary by lab protocol.

What Should You Expect Before the Test?

No special preparation is usually needed, but you may be asked to avoid certain medications (like some blood thinners) or foods that could interfere with results. Always follow your healthcare provider’s instructions.