balanced diet normally gives the body the amount vitamin E it needs, although those who choose a low-fat diet may get somewhat less than the RDA.

Info source:

http://www.cancer.org/treatment/treatmentsandsideeffects/complementaryandalternativemedicine/herbsvitaminsandminerals/vitamin-e

A balanced diet normally gives the body the amount vitamin E it needs, especially a diet high in green leafy vegetables and fiber from grains and cereals. 

In general, US residents get more than enough vitamin E from foods, although those who choose a low-fat diet may get somewhat less than the RDA.

Vitamin E supplements are often taken as capsules, with a typical dose being 400 IU per day.