It naturally provides other carotenoids. A pigment naturally present in some vegetables, fruits, or algae, beta-carotene is also called Pro-Vitamin A because it can be converted into retinol (vitamin A) according to the body's needs. Vitamin A contributes to the maintenance of una normal skin. Vitamin A contributes to the maintenance of una normal vision. Vitamin A contributes to the normal functioning of the immune system. Dosed at 7 mg per capsule, beta-carotene is extracted from the algae Dunaliella salina.