Is vitamin E dangerous?

Vitamin E is safe for the majority of healthy people when taken orally or topically at the recommended dose, 15 milligrams per day. Those taking high doses by mouth and who have diabetes, heart disease or other conditions should not take more than 400 IU per day, according to WebMD.

Some doctors worry about the risks of hemorrhagic stroke for those who take between 300 and 800 IU of vitamin E each day, according to WebMD. However, the same level of vitamin E also reduces the risk of ischemic stroke. Taking doses well above the recommended level can also lead to diarrhea, nausea, abdominal cramping, weakness, fatigue, rash, blurred vision and headache.