Vitamin E (Tocopherol) Test
A vitamin E test measures the amount of this essential antioxidant in your blood to check for deficiencies or excesses that could affect nerve and muscle function.
What is a vitamin E (tocopherol) test?
Vitamin E (also known as tocopherol or alpha-tocopherol) is a nutrient found in every cell of the body. It acts as an antioxidant, protecting cells from damage, and is vital for nerve and muscle function, blood clotting, and immune health. Most people get sufficient amounts through diet; however, digestive diseases that impair fat absorption can lead to low levels, while excessive supplement use can lead to high levels.
Why do I need a vitamin E test?
Testing is used to assess absorption, monitor premature infants, or investigate symptoms of imbalance. Symptoms of vitamin E deficiency include muscle weakness, loss of sensation in limbs, movement control issues, and vision problems. Symptoms of vitamin E excess include diarrhea, nausea, fatigue, and muscle weakness.
Deficiency is often linked to conditions such as:
- Crohn's disease
- Liver disease
- Cystic fibrosis
- Celiac disease
- Pancreatitis
What happens during a vitamin E test?
This is a blood test performed by a health care professional. You will likely need to fast for 12–14 hours before the procedure.
What do the results mean?
Normal levels vary by age. Low levels indicate a failure to absorb enough vitamin E, which is typically treated by addressing the underlying digestive condition or using supplements. High levels indicate an excess, usually from supplements, which requires stopping intake to prevent risks such as bleeding or hemorrhagic stroke. Always consult your provider before taking supplements, as they may interact with blood thinners or other medications.