Vitamin E 400iu (d-alpha tocopherol, natural source) is a powerful antioxidant and free radical scavenger. Vitamin E promotes healthy cardiovascular and blood vessel function and supports many physiological functions. As a fat-soluble antioxidant, Vitamin E may also help maintain cell membrane integrity, promote a healthy nervous system, and support healthy cognitive function. Vital Nutrients Natural Vitamin E 400iu delivers Vitamin E as d-alpha tocopherol, the form that is preferentially absorbed and accumulated by the human body to meet dietary requirements.