The effect of vitamin A on epithelial integrity.
Vitamin A is the generic term for a variety of fat-soluble substances including retinol, retinyl palmitate and the provitamin A carotenoids such as all-trans--carotene. Vitamin A is commonly known as…
Effect of micronutrient status on natural killer cell immune function in healthy free-living subjects aged 90 y.
Background: Natural killer (NK) cells play a role in natural immunity against tumor and infected cells. Advanced aging is associated with functional impairment of NK cells and increased susceptibility to…
Physiological Role of Antioxidants in the Immune System.
Diets contain naturally occurring antioxidant compounds that can stabilize highly reactive, potentially harmful molecules called free radicals. Free radicals are generated during normal cellular metabolism and result from the metabolism…
Effect of vitamin and trace-element supplementation on immune responses and infection in elderly subjects.
Ageing is associated with impaired immune responses and increased infection-related morbidity. This study assessed the effect of physiological amounts of vitamins and trace elements on immunocompetence and occurrence of infection-related…