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Vitamin C
Vitamin C regenerates vitamin E from its oxidized tocopheroxyl radical form, extending its antioxidant capacity.
Recommendation: Take together for optimal antioxidant protection. Vitamin C recycles vitamin E in cell membranes.
Vitamin E
Vitamin ·Moderate evidence ·Reviewed May 2026
A fat-soluble antioxidant that protects cell membranes from oxidative damage. Important for skin health and immune function; cardiovascular outcome benefits from routine supplementation are not established.
The bottom line
Evidence rating moderate. Most-documented uses: antioxidant protection, skin health, immune support. 19 sources indexed (2005–2025), with 26 interaction records on file.
The science
How it works, mechanistically.
Core mechanism
Integrates into cell membranes and lipoproteins, donating hydrogen atoms to neutralize lipid peroxyl radicals, breaking the chain reaction of lipid peroxidation. Works synergistically with vitamin C, which regenerates oxidized vitamin E.17
Class
Fat-Soluble Vitamin
Found in food
Almonds, Sunflower seeds, Avocado
Low-status signs
Muscle weakness, Vision problems
Absorption
Fat-soluble; take with food
Dosing
Dosing & protocol.
Common range
100–200 IU daily when specifically indicated; avoid routine 400 IU/day unless clinician-supervised
Recommended form
Mixed tocopherols or d-alpha-tocopherol (natural form)
Forms
Forms & what to buy.
Ranked by evidence and value.
d-Alpha Tocopherol Recommended
Natural alpha-tocopherol form. Natural form is retained better than synthetic dl-alpha.
dl-Alpha Tocopherol
Synthetic alpha-tocopherol blend with lower biologic activity per IU. Cheaper but less preferentially retained than the natural form.
Mixed Tocopherols
Broad-spectrum tocopherol blend. Often preferred when gamma and delta tocopherols are desired.
Tocotrienols
Vitamin E family members with distinct biologic effects. Different tissue distribution than tocopherols.
Cost
What it actually costs.
Real-world pricing across three quality tiers. Assumes Mixed Tocopherols.
BudgetBest value
$2.40 /mo
$0.08 per dose
Mid
$5.40 /mo
$0.18 per dose
Premium
$10.50 /mo
$0.35 per dose
Assumes a moderate daily dose. Mixed tocopherol and tocotrienol formulas are what usually move this category into premium territory. Updated 2026-04-02.
From food
The same dose, as food.
How much you'd eat to match a supplemental dose.
200 IU vitamin E
Roughly 8-10 ounces almonds plus sunflower seeds
Supplement-style intakes are hard to reach from food alone.
15 mg vitamin E
About 1 ounce sunflower seeds plus 1 ounce almonds
Food can cover the RDA more easily than high-IU supplement doses.
Goals
Goal-based dosing.
General antioxidant support
Timing: With a fat-containing meal
Stay cautious with higher doses if you bruise easily or use anticoagulants.
Skin support
Dose: 100-200 IU daily
Timing: With meals
More is not necessarily better; mixed tocopherols are usually preferred.
Fertility support
Dose: 100-200 IU daily
Timing: With food
Avoid routine 400 IU/day dosing unless a clinician is supervising a specific indication.
Lab work
Markers to track.
What to test, the optimal window inside the conventional range, and how long a response takes.
Alpha-Tocopherol
Vitamin E supplementation should raise alpha-tocopherol, especially when baseline intake is low.3,8
Optimal
8–15 mg/L
Conventional
5.5–17 mg/L
Responds in
4-8 weeks.
5.5optimal17
A standard lipid panel improves interpretation of this test.
Lipid Panel
ALT
In non-diabetic adults with biopsy-proven non-alcoholic steatohepatitis (NASH), high-dose vitamin E (typically RRR-alpha-tocopherol) has been shown in randomized trials to lower ALT, an indicator of reduced hepatocellular injury, alongside improvements in liver fat and inflammation. The likely mechanism is reduced oxidative stress within hepatocytes, which eases the cellular damage that releases ALT into the blood. Effect size is moderate, the benefit is most consistent in this specific NASH population, and outcomes in people with diabetes or other liver disease are less certain. This is a treatment effect in a defined disease, not a general liver-health benefit.
Optimal
7–30 U/L
Conventional
7–55 U/L
Responds in
ALT typically begins to drift downward over roughly 2 to 3 months of consistent daily dosing, with the clearest changes seen in trials measuring at 6 months to 2 years. Do not expect day-to-day shifts; reassess on the order of months, not weeks.
7optimal55
Have ALT drawn alongside the rest of a liver panel; a morning fasting draw is preferred for consistency, though ALT is not strongly meal-dependent. Timing relative to the vitamin E dose does not matter, but keep the dose, brand, and draw conditions consistent between tests so you are comparing like with like, and take vitamin E with a fat-containing meal to support absorption. Because this is tied to a liver condition, work with a clinician before starting high-dose vitamin E and have them track your trend: NASH should be confirmed and monitored by a physician, high-dose vitamin E carries its own safety considerations (including bleeding risk, interaction with anticoagulants, and a reported increase in hemorrhagic stroke risk at high doses), and any rising or persistently elevated ALT warrants prompt clinical review rather than self-management.
ASTGGTAlkaline phosphatase (ALP)
Why people use it
Symptoms it's matched to.
Where this appears in the symptom-to-supplement map, ranked by relevance.
Mildly elevated liver enzymes (raised ALT/AST)
74% relevance
Natural vitamin E has reduced transaminases and steatosis in non-diabetic adults with biopsy-proven NASH in randomized trials.
MetabolicModerate evidenceNatural d-alpha-tocopherol
High doses (around 800 IU) were used in NASH studies; discuss dose and duration with a clinician, especially if on anticoagulants.
Hot flashes and night sweats
72% relevance
Vitamin E modestly reduces hot flash frequency, with a small but consistent effect in placebo-controlled trials.1,2
HormoneModerate evidenceMixed tocopherols, 400 IU per day
Avoid synthetic dl-alpha-tocopherol only; mixed forms are preferred.
Vaginal dryness (menopausal)
72% relevance
Vitamin E supports mucosal integrity, and vaginal vitamin E has eased dryness and irritation in small menopausal studies.1,2
HormoneEmerging evidenceVaginal vitamin E suppositories or a tocopherol-based moisturizer
Topical application is more directly studied than swallowed capsules for this symptom.
Fibrocystic breast changes (lumpy, tender breast tissue)
70% relevance
Vitamin E is an antioxidant that may modulate prostaglandin and hormonal pathways, and small trials report modest reductions in cyclical breast pain.
HormoneEmerging evidenceMixed tocopherols (natural d-alpha)
Evidence is small-scale and inconsistent; avoid high doses long-term and discuss with your clinician if on blood thinners.
Age-related macular concerns
68% relevance
Vitamin E is a lipid-phase antioxidant that protects retinal membrane polyunsaturated fats from peroxidation.10,1
VisionModerate evidenceMixed tocopherols (vitamin E)
Use as part of the AREDS2 combination; high-dose alpha-tocopherol alone has mixed safety data.
Cataract risk / lens health
68% relevance
Vitamin E protects lens membrane lipids from peroxidation, which may help preserve lens transparency.1,2
VisionEmerging evidenceMixed tocopherols (vitamin E)
Randomized trials have been largely neutral; it works best as part of a broader antioxidant intake.
Dry skin
63% relevance
Vitamin E supports antioxidant protection in skin lipids.1,17
AppearanceModerate evidenceMixed tocopherols
More relevant when fat intake and antioxidant intake are both low.
Fatty liver concerns
62% relevance
Vitamin E (800 IU per day) improves NASH histology in non-diabetic adults (PIVENS trial).1,2
CardiometabolicStrong evidenceMixed tocopherols, 400 to 800 IU per day
Long-term safety at high dose is debated; do not exceed 800 IU long term without supervision.
Male fertility / low sperm quality
60% relevance
Vitamin E is a lipid-soluble antioxidant that helps protect the sperm membrane against oxidative stress.14,1
HormoneEmerging evidenceMixed tocopherols softgels
Frequently paired with selenium or vitamin C in fertility studies.
PMS breast tenderness
60% relevance
Vitamin E is an antioxidant that may modulate prostaglandin activity and has shown modest reductions in cyclical breast pain in some small trials.1,17
HormoneEmerging evidenceMixed tocopherols or d-alpha-tocopherol softgels with food
Frequently studied combined with evening primrose oil; avoid very high doses long term.
Keratosis pilaris (chicken skin)
60% relevance
Vitamin E is a lipid-phase antioxidant that supports the stratum corneum barrier and may reduce the dryness component of keratosis pilaris.1,2
AppearanceInsufficient evidenceMixed tocopherols softgel, around 100 to 200 IU daily with a fat-containing meal
Most benefit for keratosis pilaris is topical and emollient; oral evidence is thin. Best paired with daily moisturizing.
Fat malabsorption with greasy stools (steatorrhea) support
60% relevance
Chronic fat malabsorption lowers this fat-soluble antioxidant vitamin, which over time can affect nerves and muscles.1,18
DigestiveModerate evidenceMixed tocopherol or water-miscible vitamin E in malabsorption
Water-soluble (TPGS) forms are often used when fat uptake is poor; high doses can raise bleeding risk with anticoagulants.
Protocols
Featured in protocols.
Evidence-based stacks that include it, with the exact dose and timing each one uses.
Skin Support Protocol
Skin & HairOptionalModerate evidenceBeginner$25-45/mo
Dose here
200 IU
Timing
With food
Fat-soluble antioxidant that protects cell membranes from lipid peroxidation; synergistic with vitamin C17,1
Liver Support Protocol
Liver HealthOptionalStrong evidenceBeginner$25-50/mo
Dose here
400 to 800 IU mixed tocopherols
Timing
With evening meal
Vitamin E 800 IU/day improved NASH histology in PIVENS RCT; long-term safety at high doses requires monitoring.1,2
Antioxidant Defense Protocol
LongevityCoreModerate evidenceBeginner$35-60/mo
Dose here
100-200 IU daily (mixed tocopherols preferred); avoid routine 400 IU per day unless clinician supervised
Timing
With a meal that contains fat to support absorption
Vitamin E embeds in membranes and lipoproteins where it can interrupt the chain reaction of lipid peroxidation. Keeping the dose modest helps avoid the bleeding risk and other concerns seen at high doses while preserving membrane protection.1,2
Male Fertility Support Protocol
Hormonal BalanceOptionalEmerging evidenceIntermediate$45-75/mo
Dose here
200-400 IU
Timing
With a fat-containing meal
Vitamin E is a lipid-soluble antioxidant that may help protect the polyunsaturated fats in the sperm membrane from lipid peroxidation. It is most studied alongside other antioxidants such as selenium and vitamin C, and high doses are generally avoided.1,10
Genetics
Who responds differently.
HPhaptoglobin 2-2~36% of population
Haptoglobin genotype can modify cardiovascular findings with vitamin E supplementation in diabetes, with HP 2-2 studied as a higher-response subgroup (PMID 28451949).
Recommendation: People with diabetes should avoid high-dose vitamin E for cardiovascular prevention unless a clinician has reviewed genotype, bleeding risk, and medication interactions.
Safety
Full safety detail.
Interactions
Interaction records.
InfoSynergy
Vitamin A
Vitamin E protects vitamin A from oxidation in the gut, increasing its absorption and stability.
Recommendation: Taking together is beneficial. Vitamin E preserves vitamin A activity.
InfoSynergy
Selenium
Selenium and vitamin E work synergistically as antioxidants. Selenium is part of glutathione peroxidase, while E breaks lipid peroxidation chains.
Recommendation: Take together for comprehensive antioxidant protection. They address different parts of the oxidative stress cascade.
InfoSynergy
Astaxanthin
Both are lipophilic antioxidants but work at different positions in cell membranes. Astaxanthin is 6000x more potent than vitamin C as a singlet oxygen quencher.
Recommendation: Complementary membrane antioxidant protection. Astaxanthin spans the membrane, vitamin E sits within it.
InfoSynergy
Fish Oil
Vitamin E protects omega-3 fatty acids from lipid peroxidation. High-dose fish oil may increase vitamin E requirements.
Recommendation: Take vitamin E with fish oil to prevent PUFA oxidation. Many quality fish oil supplements include vitamin E for this reason.
ModerateCaution
Vitamin K1
High-dose vitamin E (>400 IU) can antagonize vitamin K-dependent clotting factor activation, increasing bleeding risk.
Recommendation: Keep vitamin E under 400 IU if taking K1 for coagulation support or if on anticoagulant therapy. Monitor INR.
ModerateCaution
Vitamin K2
High-dose vitamin E may reduce K2-dependent protein carboxylation, potentially affecting both bone and cardiovascular K2 benefits.
Recommendation: Keep vitamin E at moderate doses (200 IU or less) when relying on K2 for bone and cardiovascular health.
InfoSynergy
Coenzyme Q10
CoQ10 (ubiquinol form) regenerates vitamin E from its oxidized form in cell membranes, similar to how vitamin C regenerates vitamin E.
Recommendation: Take together for enhanced membrane antioxidant protection.
InfoCaution
Fish Oil
High-dose fish oil increases vitamin E requirements because PUFAs are susceptible to peroxidation. May deplete vitamin E stores.
Recommendation: If taking high-dose fish oil (>3g/day), ensure adequate vitamin E intake to prevent PUFA-induced vitamin E depletion.
InfoSynergy
Vitamin C Liposomal
Vitamin C Liposomal regenerates vitamin E from its oxidized tocopheroxyl radical form, extending its antioxidant capacity.
Recommendation: Take together for optimal antioxidant protection. Vitamin C Liposomal recycles vitamin E in cell membranes.
ModerateCaution
Vitamin K2 MK-4
High-dose vitamin E may reduce K2-dependent protein carboxylation, potentially affecting both bone and cardiovascular K2 benefits.
Recommendation: Keep vitamin E at moderate doses (200 IU or less) when relying on K2 for bone and cardiovascular health.
InfoSynergy
Coenzyme Q10 Ubiquinol
CoQ10 (ubiquinol form) regenerates vitamin E from its oxidized form in cell membranes, similar to how vitamin C regenerates vitamin E.
Recommendation: Take together for enhanced membrane antioxidant protection.
Sources
Sources, by evidence tier.
Numbered references. Citations throughout the page link here.
Meta-analyses & systematic reviews
13- 1Vitamin C and E antioxidant supplementation may significantly reduce pain symptoms in endometriosis: A systematic review and meta-analysis of randomized controlled trialsNeeds reviewPMIDBayu P, Wibisono JJ · PLoS One · 2024
In 5 RCTs, vitamin C and E combination was associated with higher proportion of reduced chronic pelvic pain (RR 7.30, 95% CI 3.27-16.31), alleviation of dysmenorrhea (RR 1.96), and dyspareunia (RR 5.08) in endometriosis patients.
- 2Vitamin E Does not Favor Recovery After Exercises: Systematic Review and Meta-analysisNeeds reviewPMIDde Lima KS, Schuch F, Righi NC et al. · International journal of sports medicine · 2024
de Lima KS, Schuch F, Righi NC et al.. Vitamin E Does not Favor Recovery After Exercises: Systematic Review and Meta-analysis. International journal of sports medicine. 2024
- 3Vitamin E and Multiple Health Outcomes: An Umbrella Review of Meta-AnalysesNeeds reviewPMIDHuang Y et al. · Nutrients · 2023
Umbrella review of meta-analyses; only association between circulating alpha-tocopherol and reduced wheeze/asthma in children was substantiated by consistent evidence
- 4Comparative effects of vitamin and mineral supplements in the management of type 2 diabetes in primary care: A systematic review and network meta-analysis of randomized controlled trialsNeeds reviewPMIDXia J, Yu J, Xu H et al. · Pharmacological Research · 2023
In 170 RCTs with 14,223 participants, vitamin E supplements ranked best in reducing LDL cholesterol levels (SUCRA 80.0%). Network meta-analysis showed micronutrient supplements, especially vitamin E, may be efficacious in managing T2DM.
- 5Pharmacokinetics and bioavailability of tocotrienols in healthy human volunteers: a systematic reviewNeeds reviewPMIDSharif M, Khan DA, Farhat K et al. · JPMA. The Journal of the Pakistan Medical Association · 2023
Sharif M, Khan DA, Farhat K et al.. Pharmacokinetics and bioavailability of tocotrienols in healthy human volunteers: a systematic review. JPMA. The Journal of the Pakistan Medical Association. 2023
- 6Vitamin E intake and multiple health outcomes: an umbrella reviewNeeds reviewPMIDZhang T, Yi X, Li J et al. · Frontiers in public health · 2023
Zhang T, Yi X, Li J et al.. Vitamin E intake and multiple health outcomes: an umbrella review. Frontiers in public health. 2023
- 7The Effect of Vitamin E Supplementation in Postmenopausal Women-A Systematic ReviewNeeds reviewPMIDFeduniw S, Korczyńska L, Górski K et al. · Nutrients · 2022
Feduniw S, Korczyńska L, Górski K et al.. The Effect of Vitamin E Supplementation in Postmenopausal Women-A Systematic Review. Nutrients. 2022
- 8Alpha-tocopherol and contrast-induced nephropathy: A meta-analysis of randomized controlled trialsNeeds reviewPMIDMonami M, Cignarelli A, Pinto S et al. · International journal for vitamin and nutrition research. Internationale Zeitschrift fur Vitamin- und Ernahrungsforschung. Journal international de vitaminologie et de nutrition · 2021
Monami M, Cignarelli A, Pinto S et al.. Alpha-tocopherol and contrast-induced nephropathy: A meta-analysis of randomized controlled trials. International journal for vitamin and nutrition research. Internationale Zeitschrift fur Vitamin- und Ernahrungsforschung. Journal international de vitaminologie et de nutrition. 2021
- 9Beneficial Effects of Vitamin E Supplementation on Endothelial Dysfunction, Inflammation, and Oxidative Stress Biomarkers in Patients Receiving Hemodialysis: A Systematic Review and Meta-Analysis of Randomized Controlled TrialsSource linkedPMIDAhmadi A, Mazooji N, Roozbeh J et al. · Int J Vitam Nutr Res · 2021
- 10Systematic review and meta-analyses of vitamin E (alpha-tocopherol) supplementation and blood lipid parameters in patients with diabetes mellitusSource linkedPMIDAsbaghi O, Sadeghian M, Nazarian B et al. · Diabetes Metab Syndr · 2021
- 11Vitamin E and all-cause mortality: a meta-analysisNeeds reviewPMIDAbner EL et al. · Curr Aging Sci · 2011
Meta-analysis of 57 trials (246,371 subjects) produced RR of 1.00; vitamin E unlikely to affect mortality regardless of dose up to 5,500 IU/day
- 12Effects of vitamin E on stroke subtypes: meta-analysis of randomised controlled trialsNeeds reviewPMIDSchurks M, Glynn RJ, Rist PM et al. · BMJ · 2010
22% increased risk of hemorrhagic stroke, 10% reduced ischemic stroke risk
- 13Meta-analysis: high-dosage vitamin E supplementation may increase all-cause mortalityNeeds reviewPMIDMiller ER 3rd et al. · Ann Intern Med · 2005
High-dosage vitamin E supplementation (>=400 IU/day) may increase all-cause mortality; dose-response analysis shows increased risk starting at 150 IU/day
Randomized controlled trials
3- 14Vitamin E supplementation and pneumonia risk in males who initiated smoking at an early ageSource linkedPMIDHemila H · Eur Respir J · 2020
- 15Vitamin E and the risk of prostate cancer: the Selenium and Vitamin E Cancer Prevention Trial (SELECT)Needs reviewPMIDKlein EA et al. · JAMA · 2011
Among 35,533 men, vitamin E 400 IU/day significantly increased prostate cancer risk (HR 1.17; 99% CI 1.004-1.36) compared to placebo
- 16Vitamin E supplementation and cardiovascular events in high-risk patients (HOPE-TOO trial)Source linkedPMIDLonn E, Bosch J, Yusuf S et al. · JAMA · 2005
Reviews & position papers
3- 17Vitamin E (alpha-Tocopherol): Emerging Clinical Role and Adverse Risks of Supplementation in AdultsNeeds reviewPMIDVarious · Nutrients · 2025
High-dose vitamin E supplementation may increase risks; beneficial antioxidant properties may be outweighed by harmful interference in normal cellular processes at high doses
- 18ESPEN micronutrient guidelineNeeds reviewPMIDBerger MM, Shenkin A, Schweinlin A et al. · Clinical Nutrition · 2022
Comprehensive guideline proposing 170 recommendations for 26 micronutrients including vitamin E. Critical micronutrient deficiencies were identified in numerous acute and chronic diseases with monitoring and management strategies proposed.
- 19A Systematic Review of Effects of Vitamin E on the Cardiovascular SystemNeeds reviewPMIDAshor AW et al. · Front Nutr · 2021
Observational studies showed inverse association between vitamin E and cardiovascular disease; interventional trials were negative. No overall cardiovascular benefit from supplementation
Keep exploring
Deep dives & adjacent profiles.
This page is educational. Do not start, stop, or change a supplement or medication based on it without checking with a qualified healthcare professional.
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Vitamin E in NutriStack.
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