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Vitamin E Side Effects & Safety

Evidence:Moderate
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This content is for informational purposes only and does not constitute medical advice. Statements about dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease. Individual results may vary — consult your healthcare provider before starting any supplement. Full disclaimer

Safety Profile

Overall safety rating: Generally Safe

Potential Side Effects

  • Generally well-tolerated at recommended doses
  • High doses (>400 IU/day) may increase bleeding risk
  • Nausea, fatigue, and headache at very high doses
  • Meta-analysis raised concerns about all-cause mortality at doses >400 IU/day (debated)

Drug & Supplement Interactions

  • May increase bleeding risk when combined with anticoagulants (warfarin, aspirin, NSAIDs)
  • High doses may interfere with vitamin K-dependent clotting factors
  • Synergistic with vitamin C — vitamin C regenerates oxidized vitamin E
  • Orlistat and cholestyramine may reduce vitamin E absorption
  • May interact with chemotherapy and radiation therapy (consult oncologist)

Maximum Dose

Do not exceed: 1,000 mg/day (1,500 IU natural or 1,100 IU synthetic) is the NIH Upper Tolerable Intake Level

Full Vitamin E Guide

References

  1. RCTEberlein-König B, Placzek M, Przybilla B. (1998). Protective effect against sunburn of combined systemic ascorbic acid (vitamin C) and d-alpha-tocopherol (vitamin E). Journal of the American Academy of Dermatology. DOI PubMed
  2. ReviewThiele JJ, Hsieh SN, Ekanayake-Mudiyanselage S. (2005). Vitamin E: critical review of its current use in cosmetic and clinical dermatology. Dermatologic Surgery. DOI PubMed
  3. ObservationalCosgrove MC, Franco OH, Granger SP, et al. (2007). Dietary nutrient intakes and skin-aging appearance among middle-aged American women. American Journal of Clinical Nutrition. DOI PubMed
  4. Meta-analysisMiller ER, Pastor-Barriuso R, Dalal D, et al. (2005). Meta-analysis: high-dosage vitamin E supplementation may increase all-cause mortality. Annals of Internal Medicine. DOI PubMed
  5. Amin AM, Mostafa H (2026). Vitamin E and cognitive function: A systematic review of clinical evidence.. Nutrition research (New York, N.Y.). DOI PubMed
  6. Wen H, Deng H, Yang L, Li L, et al. (2024). Vitamin E for people with non-alcoholic fatty liver disease.. The Cochrane database of systematic reviews. DOI PubMed
  7. de Lima KS, Schuch F, Righi NC, Neto LJR, et al. (2024). Vitamin E Does not Favor Recovery After Exercises: Systematic Review and Meta-analysis.. International journal of sports medicine. DOI PubMed
Show 5 more references
  1. Qi S, Luo X, Liu S, Ling B, et al. (2024). Effect of vitamin B2, vitamin C, vitamin D, vitamin E and folic acid in adults with essential hypertension: a systematic review and network meta-analysis.. BMJ open. DOI PubMed
  2. Chee NM, Sinnanaidu RP, Chan WK (2024). Vitamin E improves serum markers and histology in adults with metabolic dysfunction-associated steatotic liver disease: Systematic review and meta-analysis.. Journal of gastroenterology and hepatology. DOI PubMed
  3. Xiong Z, Liu L, Jian Z, Ma Y, et al. (2023). Vitamin E and Multiple Health Outcomes: An Umbrella Review of Meta-Analyses.. Nutrients. DOI PubMed
  4. Vogli S, Naska A, Marinos G, Kasdagli MI, et al. (2023). The Effect of Vitamin E Supplementation on Serum Aminotransferases in Non-Alcoholic Fatty Liver Disease (NAFLD): A Systematic Review and Meta-Analysis.. Nutrients. DOI PubMed
  5. Zhang T, Yi X, Li J, Zheng X, et al. (2023). Vitamin E intake and multiple health outcomes: an umbrella review.. Frontiers in public health. DOI PubMed