Vitamin E d-Alpha Tocopherol by Schiff/Bio Foods. Vitamin E acts as an antioxidant, supports the Defense mechanism of body, and is needed for cardiovascular and nervous system health. It is also needed for healthy skin and hair. The natural form of alpha-tocopherol is known as "d-alpha tocopherol", whereas the synthetic form is called "dl-alpha tocopherol." The natural form is twice as bioavailable as synthetic forms.