It is not harmful for an individual to consume vitamin E through foods, but consuming high doses of vitamin E supplements may cause health problems, according to National Institutes of Health. The chance of health risks increases with the amount of vitamin E supplements taken, according to WebMD.
Large doses of vitamin E supplements may increase the risk of bleeding and hemorrhagic stroke, according to National Institutes of Health.
Large doses of vitamin E supplements can also cause headaches, rashes, nausea, blurred vision and bruising, according to WebMD. Individuals with diabetes or heart disease should not consume vitamin E doses of 400 IU or more per day.