Vitamin E and Stroke Risk: What Seniors Should Know
The vitamin behind this concern is vitamin E—but the headline needs an important qualification: the evidence concerns vitamin E supplements, particularly higher doses, not vitamin E naturally present in foods.
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High-dose vitamin E supplements can increase bleeding risk. NIH notes that high doses may increase the risk of serious bleeding, including hemorrhagic (bleeding) stroke. Office of Dietary Supplements+1
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Evidence is mixed rather than definitive. An older meta-analysis found a 22% relative increase in hemorrhagic stroke, while a later systematic review of 18 trials involving about 148,000 participants did not find a statistically significant increase in hemorrhagic stroke. PubMed+1
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Vitamin E has not been shown to prevent stroke overall. The 2024 American Heart Association/American Stroke Association primary-prevention guideline says vitamin E supplementation is not effective for reducing stroke risk. AHA Journals
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Vitamin E can be particularly important to review if someone takes blood-thinning or antiplatelet medication, because it can increase bleeding tendency. NCCIH+1
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Getting vitamin E from foods such as nuts, seeds, vegetable oils, and leafy green vegetables is different from taking concentrated supplements and is not considered harmful at normal dietary levels. MedlinePlus
For older adults
Don’t abruptly stop a prescribed medication or supplement regimen because of a headline. Instead, check the vitamin E dose and all medications/supplements with a doctor or pharmacist—especially if aspirin, warfarin, or another blood thinner is involved.
And despite the dramatic “overnight” wording, there isn’t evidence that simply taking vitamin E causes a stroke overnight in an otherwise healthy person. The concern is about increased bleeding risk associated with supplementation over time and in particular circumstances. Office of Dietary Supplements+1
