If you know your "ABC's" then you already knew what was next.(I hope) :]
Vitamin E is just as important, or maybe even more important than any other of the 7 basic vitamins. Without vitamin E your body wouldn't be able to absorb other nutrients and process other vitamins properly. Which could lead to having the deficiency symptoms of other vitamins and minerals, when all you lack is E.
Specifically, vitamin E helps your body keep nutrients from being destroyed in your body by oxygen. It also helps your body use vitamin A and increase the amount of vitamin A that can be stored in your liver. E helps convert your food into energy, keep your heart and skeletal muscles healthy, and helps burns heal faster.
Some edible sources of vitamin E are:
-whole grain breads and cereals
Vitamin E deficiency symptoms are...fatigue, weakness, & deficiency symtoms of other vitamins.
It's hard to determine the amount of vitamin E that you need, because it depends on the amount of fats and oils you eat. However, you generally need more vitamin E the more fats and oils that you eat.
Again, just do your best to maintain a healthy diet and lifestyle with the 7 basic food groups all incorporated proportionately, and plenty of good exercise!