All humans and most animals require vitamin E

Studies in animals indicate that without vitamin E they are unable to reproduce. 

The level of vitamin E required in humans depends heavily on the the amount of polyunsaturated fats in one's diet.

The best sources of vitamin E are polyunsaturated vegetable oils, nuts, seeds and whole grains.

Cooking food or processing it can significantly reduce vitamin E content.

Other good sources include asparagus, avocados, berries, green leafy vegetables and tomatoes.

Without vitamin E cells in the body would be susceptible to damage.  Nerve cells are particullary susceptible to damage.

There are four main conditions that can occur when levels are vitamin E are not sufficient:

Fat malabsorption syndromes including cystic fibrosis, celiac disease

Premature babies

Sickle cell disease and thalassemia

Hemodialysis patients.

In adults, signs of vitamin E deficiency include muscle weakness, nerve damage, coordination issues, involuntary eye movements, and anemia.

Vitamin E is the primary antioxidant in the body and protects cells from heavy metals including lead and mercury, toxic compunds, radiation, drugs, and free-radicals.  It also protects against many common illnesses.

It also is key in immune system protection during stress and chronic viral illnesses. 

Vitamin E can protect the body from heart disease, cancer and strokes.  It is also used for cardiovascular disease, diabetes, MS, Parkinson's and menopause.

 Common Uses

Acne

Aids

liver disease (caused via alcohol)

Allergies

Anemia

Angina

Cancer

Capillary fragility

Cataract

Cervical dysplasia

Diabetes

Dysmenorrhea

Eczema

Epilepsy

Gallstones

Hepatitis

Herpes

Immunodepression

Infections

Inflammation

Lupus

Menopause

MS

Neuralgia

Neuromuscular degeneration

Osteoarthritis

Parkinson's Disease

Peptic ulcers

Periodontal disease

Pregnancy

PMS

Raynaud's disease

Rheumatoid arthritis

Skin ulcers

Ulcerative colitis

Wound healing

Diabetes