Vitamin E Test Vitamin E is a fat-soluble vitamin that plays a crucial role in maintaining the health of cells and tissues in the body. The Vitamin E test measures the level of alpha-tocopherol, one of the eight forms of vitamin E, in the blood. Pre-test preparation: No specific preparation is required for the Vitamin E test. Testing method: The Vitamin E test is usually performed on a blood sample obtained by a venipuncture. The sample is then sent to a laboratory for analysis. Common symptoms for prescribing this test: The Vitamin E test is typically ordered when a person has symptoms of vitamin E deficiency, such as neurological problems, muscle weakness, or vision problems. It may also be ordered as part of a routine evaluation of overall health or as part of a larger nutritional assessment. Diagnosis: Vitamin E deficiency is diagnosed when the level of alpha-tocopherol in the blood is below a certain threshold. Reference range: The reference range for Vitamin E is typically between 8-20 mcg/mL. Normal values: A normal Vitamin E test result is usually between 8-20 mcg/mL. Medical disclaimer: The information provided is for educational purposes only and is not intended to replace the advice of a healthcare professional. It is important to consult with a qualified healthcare provider for proper diagnosis and treatment.