Vitamin E, alpha-Tocopherol, Serum

Vitamin E is a fat-soluble antioxidant, primarily in the form of alpha-tocopherol in the blood. It plays a key role in protecting cell membranes from oxidative stress, supports red blood cell production, maintains immune and nervous system health, and has anticoagulant properties.

This test measures serum alpha-tocopherol and can be done independently or as part of a fat-soluble vitamin panel.

When is it ordered?

• Neurological symptoms of unknown origin (e.g. muscle weakness, ataxia, visual disturbances)
• Memory problems or cognitive decline
• Suspected fat malabsorption (celiac disease, cystic fibrosis, liver disease, chronic pancreatitis)
• Patients receiving parenteral nutrition or fat-blocking drugs
• Antioxidant status evaluation in chronic/inflammatory diseases
• High-dose vitamin E supplementation monitoring
• Possibly: depression, anxiety, infertility, Alzheimer’s

Symptoms of Vitamin E Deficiency:

• Ataxia, peripheral neuropathy, muscle weakness
• Hemolytic anemia
• Retinopathy
• Cognitive issues and fatigue
• Increased infection susceptibility

Test Accuracy:

Serum vitamin E levels are reliable but should be interpreted with lipid levels. Alpha-tocopherol is transported via lipoproteins. Ideally, use the alpha-tocopherol to cholesterol ratio.

Reference ranges (μmol/L):

• Men: 7.8–33.2
• Women: 10.2–43.6
• Pregnancy (2nd–3rd trimester): 15.6–55.7

Vitamin E Excess:

• May increase bleeding risk (vitamin K interference)
• GI symptoms, headaches, fatigue
• Caution with anticoagulants
• UL: 300 mg/day (approx. 450 IU)

Sources:

• Vegetable oils (e.g. wheat germ, sunflower)
• Nuts and seeds
• Green leafy vegetables (spinach, broccoli)
• Whole grains