Vitamin E is added to food products as a nutrient, but more
often it is added for its anti-oxidant properties, protecting
oils and fats from oxidation.
Tocopherols come in various forms only slightly different
from the α-tocopherol shown in the structural formula
above. β and γ forms differ in where the methyl
groups are attached to the ring structure. An ingredients
list may single out the α form, or may just say