Vitamin E
The body's primary fat-soluble antioxidant. Protects cell membranes and circulating lipids from oxidation. Always take the mixed-tocopherol form.
Strong as a cofactor / network antioxidant. Mixed evidence on cardiovascular outcomes — early enthusiasm was tempered by HOPE and similar trials. The Mediterranean diet (rich in E from olive oil and nuts) is more protective than supplementation. Skin and fertility benefits when deficient. 4–8 weeks for blood levels.
Vitamin E is a family of eight related compounds — four tocopherols and four tocotrienols. Alpha-tocopherol is the most abundant in the body, but the gamma and delta forms (and the tocotrienols) have distinct, complementary roles. It sits in cell membranes and lipoproteins (HDL, LDL) and stops free-radical chain reactions before they damage the structural fats. Deficiency is uncommon in well-nourished people, but supplementing the wrong form (synthetic alpha-tocopherol alone, the cheap stuff on most shelves) actually depletes the other tocopherols and may do net harm.
- Form
- Mixed tocopherols + tocotrienols — non-negotiable. Look for products labelled 'full-spectrum' or 'mixed-family' that list alpha, beta, gamma, delta tocopherols. Avoid 'dl-alpha-tocopherol' (synthetic, half-inactive) and avoid alpha-tocopherol-only supplements (deplete gamma form).
- Dose
- 100–400 IU/day mixed tocopherols. More is not better — the high-dose trials that showed harm used isolated alpha-tocopherol at >400 IU/day.
- Timing
- With a fat-containing meal. Anytime.
- Schedule
- Daily if supplementing, but most people don't need to supplement at all if eating enough nuts, seeds, and olive oil.
- Side effects
- Generally well-tolerated. High doses can cause headache, fatigue, nausea, blurred vision.
- Interactions
- Blood thinners (warfarin, aspirin, DOACs) — vitamin E has mild antiplatelet effect, additive at high doses. Stop high-dose E 1–2 weeks before surgery. Statins — vitamin E may slightly reduce their lipid-lowering effect (clinical relevance debated).
- Contraindications
- Bleeding disorders. Planned surgery (stop in advance). Caution with warfarin.
- Lab markers
- Serum alpha-tocopherol (rarely tested). Functional markers: oxidative stress panels (8-OHdG, F2-isoprostanes) if research-grade.
- Food sources
- Almonds, hazelnuts, sunflower seeds, wheat germ oil, hazelnut oil, olive oil, avocado, leafy greens (spinach, swiss chard), red bell pepper. A daily handful of nuts and regular olive oil use covers most people.
Pairs with
Selenium (synergistic — glutathione peroxidase uses selenium, vitamin E is the membrane-resident partner). Vitamin C (regenerates oxidised vitamin E). Omega-3 fish oil (protects the PUFAs from oxidation). CoQ10 (network antioxidant).
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