Vitamin A is a group of antioxidant compounds that play an important role in vision, bone growth and health of the immune system. Vitamin A also helps the overall health of eyes, mucous membranes and helps skin be the effective barriers against bacteria and viruses, reducing the risk of inflammations, respiratory problems and other infectious diseases. Seabuckthorn has higher concentration of Vitamin A than in any other source; it has 3 times more Vitamin A than in carrots. Seabuckthorn contains eight different types of carotenoids. The most active is ß (beta) carotene, from which retinol forms Vitamin A. Studies in recent years have proven the ability of carotenoids to combat the functioning of carcinogenic substances responsible for the formation of malignant tumours.