Among the essential vitamins, few have a more important role than Vitamin A. It is at the core of cell development itself. Thats because Vitamin A plays an important role in the normal transcription of DNA into RNA, which ensures genes are expressed properly and cells develop normally. This is important to the development and activation of certain immune cells such as NK cells, lymphocytes, and monocytes. Vitamin A is a potent antioxidant and provides protection against freeradical damage to cells, DNA, and many other parts of the body. Also known as retinol, Vitamin A helps support healthy retina cells within the eye, which in turn supports healthy vision. This is especially helpful in maintaining low light vision and helping eyes to differentiate between colors.