Vitamin E (Alpha-Tocopherol)
Also known as: alpha‑tocopherol, vit E, tocopherol
Randomised trials and a meta‑analysis in the provided abstracts show heterogeneous results. In athletes, supplementation raised plasma levels and reduced markers of muscle damage and oxidative stress but did not improve performance; a diabetes meta‑analysis found no overall lipid benefits except possibly with ≥12 weeks of use; an ophthalmic trial reported no effect on trabeculectomy success; cohort/trial data linked higher serum alpha‑tocopherol with lower prostate cancer risk in male smokers in one large trial cohort analysis.
Last reviewed: 2026-10-14 · 4 indexed studies
Set your location for accurate regulatory status
Saved on this device — no sign-in needed.
Overview
Alpha‑tocopherol (vitamin E) is a fat‑soluble antioxidant commonly used as an oral supplement. Human trials show mixed effects across outcomes: some biomarker and oxidative stress reductions after strenuous exercise, inconsistent effects on blood lipids in people with diabetes, and no clear benefit for postoperative glaucoma surgery outcomes in the trials provided.
Mechanism & Function
Mechanism of Action
Alpha‑tocopherol acts as a lipid‑soluble free radical scavenger, protecting cell membranes and lipoproteins from oxidative damage; this antioxidant property can reduce oxidative biomarkers and markers of muscle damage after strenuous exercise.
Physiological Role
Serves as an antioxidant in lipid environments, protecting polyunsaturated fatty acids in membranes and lipoproteins from peroxidation and thereby influencing oxidative stress markers.
Primary Pathways
Performance / Health Relevance
Limited. Trials show biochemical reductions in oxidative stress and creatine kinase after intense endurance exercise but no measurable improvement in aerobic performance or heart‑rate responses in trained cyclists.
Evidence Review
Compare Vitamin E Forms
Full comparison3 vitamin e forms are indexed. Bioavailability, clinical evidence, and best-use cases differ meaningfully between them.
| Form | Evidence |
|---|---|
Vitamin E (Alpha-Tocopherol)This page Fat‑containing meals increase absorption of this fat‑soluble vitamin. | 50/100 |
| Tocotrienols Bioavailability is generally low and variable, influenced by dietary fat intake and carrier formulation. | 65/100 |
| Vitamin E (Mixed Tocopherols) Fat-soluble vitamin; absorption is dependent on dietary fat and bile salts. Alpha-tocopherol has the highest affinity for alpha-tocopherol transfer protein (alpha-TTP), which preferentially incorporates it into VLDL for circulation, leading to its higher bioavailability. | 50/100 |
Practical Use & Dosage
- Minimum Effective Dose
- 50 mg/day has been used in long‑term trials; 300 mg/day used postoperatively in a short trial.
- Optimal Range
- Trial doses reported in these abstracts ranged from 50 mg/day to 300 mg/day.
- Upper / Caution Level
- Tolerable upper intake level (adults) commonly cited as 1000 mg/day alpha‑tocopherol; high doses may carry risks (see safety).
- Timing
- Typically taken with a meal containing fat to aid absorption.
- Best Format
- Alpha‑tocopherol (d‑ or dl‑forms) in oil or softgel formulations.
- Bioavailability
- Fat‑containing meals increase absorption of this fat‑soluble vitamin.
- Absorption Considerations
- Requires intestinal fat and normal fat‑absorption processes; coadministration with lipids improves uptake.
Safety & Interactions
Side Effects
- •Gastrointestinal upset at high doses (noted in general guidance rather than these abstracts)
- •Bleeding risk reported with very high doses in broader literature (not in provided abstracts)
Contraindications
- Known hypersensitivity to vitamin E formulations
Drug Interactions
- •May interact with anticoagulant/antiplatelet therapies increasing bleeding risk (reported in wider literature, not in provided abstracts)
Who Should Avoid
- •People on high‑dose anticoagulants without medical supervision
- •Those advised to limit vitamin E by a clinician
Monitoring
Monitor for bleeding signs if taking anticoagulants; check with clinician before high‑dose use. No routine monitoring specified in the provided abstracts.
Frequently Asked Questions
Auto-generated from indexed evidence — dosage, safety, interactions, and more.
When is Vitamin E (Alpha-Tocopherol) typically used or indicated?
Vitamin E (Alpha-Tocopherol) is most commonly used for: antioxidant support, general health, recovery from strenuous exercise, eye/ocular support. Serves as an antioxidant in lipid environments, protecting polyunsaturated fatty acids in membranes and lipoproteins from peroxidation and thereby influencing oxidative stress markers.
How does Vitamin E (Alpha-Tocopherol) work?
Alpha‑tocopherol acts as a lipid‑soluble free radical scavenger, protecting cell membranes and lipoproteins from oxidative damage; this antioxidant property can reduce oxidative biomarkers and markers of muscle damage after strenuous exercise.
What is the recommended dose of Vitamin E (Alpha-Tocopherol)?
The optimal range is Trial doses reported in these abstracts ranged from 50 mg/day to 300 mg/day.. with a minimum effective dose of 50 mg/day has been used in long‑term trials; 300 mg/day used postoperatively in a short trial.. Best taken: Typically taken with a meal containing fat to aid absorption.. Upper / caution level: Tolerable upper intake level (adults) commonly cited as 1000 mg/day alpha‑tocopherol; high doses may carry risks (see safety)..
What are the side effects of Vitamin E (Alpha-Tocopherol)?
Reported side effects include: Gastrointestinal upset at high doses (noted in general guidance rather than these abstracts); and Bleeding risk reported with very high doses in broader literature (not in provided abstracts). Monitoring: Monitor for bleeding signs if taking anticoagulants; check with clinician before high‑dose use. No routine monitoring specified in the provided abstracts.
Does Vitamin E (Alpha-Tocopherol) interact with medications?
Known or theoretical interactions: May interact with anticoagulant/antiplatelet therapies increasing bleeding risk (reported in wider literature, not in provided abstracts). Always check with a clinician before combining with prescription medication.
Who should avoid Vitamin E (Alpha-Tocopherol)?
Vitamin E (Alpha-Tocopherol) is generally not recommended for: People on high‑dose anticoagulants without medical supervision; Those advised to limit vitamin E by a clinician; and Known hypersensitivity to vitamin E formulations.
How strong is the evidence for Vitamin E (Alpha-Tocopherol)?
Evidence level: Limited (overall score 50/100), based on 4 indexed studies on SuppIndex.
Research & References (4)
Systematic review and meta-analyses of vitamin E (alpha-tocopherol) supplementation and blood lipid parameters in patients with diabetes mellitus.
Systematic review and meta‑analysis of alpha‑tocopherol supplementation and blood lipid parameters in patients with diabetes mellitus (RCTs up to Oct 2020).
alpha-Tocopherol supplementation in racing cyclists during extreme endurance training.
Randomised trial in 30 elite cyclists over 5 months assessing alpha‑tocopherol supplementation effects on performance and oxidative stress markers.
Serum and dietary vitamin E in relation to prostate cancer risk.
Analysis within the alpha‑Tocopherol, beta‑Carotene Cancer Prevention Study cohort (29,133 male smokers) relating serum and dietary vitamin E to prostate cancer risk over up to 19 years.
Dietary tocopherol supplementation after trabeculectomy and phacotrabeculectomy: double-blind randomized placebo-controlled trial.
Double‑blind RCT of postoperative oral alpha‑tocopheryl‑acetate (300 mg/day) versus placebo after trabeculectomy/phacotrabeculectomy with 1 year follow‑up.
Related Ingredients
Other top-rated ingredients in Vitamins.
Vitamin D3
91/100A secosteroid prohormone converted to calcitriol (1,25-dihydroxyvitamin D), functioning as a nuclear hormone receptor ligand regulating >1000 genes.
Vitamin B3 (Niacin)
80/100Niacin is a precursor to nicotinamide adenine dinucleotide (NAD+) and nicotinamide adenine dinucleotide phosphate (NADP+), two critical coenzymes involved in over 400 enzymatic reactions in the body. These reactions are central to energy metabolism, DNA repair, and antioxidant defense. Pharmacological doses of nicotinic acid have a well-established role in lowering LDL cholesterol and triglycerides and raising HDL cholesterol, primarily through inhibiting hepatic VLDL synthesis and reducing fatty acid mobilization. Nicotinamide, while also a source of NAD+, does not exert the same hypolipidemic effects but is crucial for various cellular processes and has shown promise in certain dermatological conditions and neurological contexts at higher doses.
Vitamin B9 (L-Methylfolate / 5-MTHF)
75/100L-Methylfolate is the principal circulating form of folate and the only form that can cross the blood-brain barrier. It plays a critical role as a coenzyme in one-carbon metabolism, particularly in the methylation cycle. Its direct bioavailability makes it a preferred supplemental form, especially when addressing folate deficiencies or supporting processes requiring efficient methylation, such as neurotransmitter synthesis and homocysteine regulation. Research indicates its efficacy in supporting mood, cardiovascular health, and cognitive function, particularly in populations with impaired folate metabolism.
Research Overview
Limited EvidenceCite this ingredient
One-click citation export in APA, MLA, Chicago, BibTeX, or HTML. The URL below is stable and safe to link.
Stable URL
https://thesuppindex.com/ingredients/vitamin-e-alpha-tocopherol
SuppIndex. (2026). Vitamin E (Alpha-Tocopherol): Evidence summary, dosage and clinical studies. Retrieved October 16, 2026, from https://thesuppindex.com/ingredients/vitamin-e-alpha-tocopherol
Based on 4 indexed studies · Evidence level: Limited.
Goal Ratings
Stack Compatibility
Commonly co‑supplemented with other fat‑soluble vitamins and dietary lipids; account for total vitamin E intake from diet and other supplements.