Vitamin E does have a role in the health of the reproductive system. Doctors Herbert Evan and Katherine Bishop did a study on rat who were maintain on a diet free of vitamin E: “They grew normally and were apparently very healthy” except, as the researchers wrote: “practically all of such animals are sterile.”
Vitamin E´s primary role appears to be as an antioxidant that protects fatty acids (oils) against oxidation and rancidity, since all cells and subcellular membranes of our body contain a sizeable portion of fatty acids, vitamin E is required to protect us against oxidation.
One of vitamin E´s protective effects against aging may be its effect on the immune system which wakens with age. Some researchers believe free radical oxidation reactions may contribute to this decline in the immune system.