Vitamin E supplement: How much should I take daily. THE ANSWER is a supplement containing no more than 150–200 IU

http://www.health.harvard.edu/newsletter_article/Easy_does_it_with_vitamin_E

The following is extracted from the above web link.

What to do

Many researchers haven't given up hope for lower doses of vitamin E, but that will depend on the results of ongoing trials. In the meantime, try to get most of your vitamin E from food, because there's strong evidence that diets containing large amounts of vitamin E-rich foods are good for your health.

If you're uncertain about how much you're getting from your diet, you may want to consider taking a supplement containing no more than 150–200 IU (note: of vitamin E) per day.

At that level, taking vitamin E still falls under the rubric of "shouldn't hurt and might help."