Vitamin A aids in the growth and repair of body tissues, which helps maintain smooth, soft, disease-free skin.
Internally, it helps protect the mucous membranes of the nose, sinuses, lungs, eyelids, mouth, throat, stomach, intestines (digestive tract), vagina and uterus, thereby reducing susceptibility to infection. This protection also aids the mucous membranes in combating the effects of invasive microorganisms and other harmful particles, including air pollutants. The soft tissues of the kidneys and bladder are also protected. Vitamin A also prompts the secretion of gastric juices necessary for proper digestion of proteins.
Other important functions of Vitamin A include the building of strong bones and teeth, the formation of rich blood, reproduction, cell membrane stability and development, immunity and the maintenance of good eyesight. Research shows that beta-carotene helps defend the body against some types of cancer.