Vitamin E is present in high-fat (but luckily, low-saturated fat) foods like vegetable oils, germs, nuts, and seeds.
It is impossible for you to get more than 200 IUs daily through diet alone.
Since vitamin E-rich foods can only go so far, you should take 400 to 800 IUs of vitamin E daily as a promemory (and antiaging, more broadly) dose, with 1,200 units for those among you who are more adventurous. Higher doses of vitamin E can cause headache, raise blood pressure, and increase the risk of bleeding in people taking anticoagulant medications like warfarin (Coumadin). There were few side effects in the study involving more than three hundred Alzheimer's patients who each took 2,000 IUs of vitamin E daily, but note that patients at high risk like those on Coumadin were excluded from study participation. Research-wise, large-scale, systematic studies with vitamin E have moved beyond Alzheimer's disease to people with mild memory loss, but these will take a few more years to complete.
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