Vitamin A is essential to a broad range of physiological processes. It is vital to eye health and is particularly important for optimal night and low-light vision. Vitamin A also affects gene regulation, cell growth, bone metabolism, and skin health. Supplementation with vitamin A supports immune health by maintaining the integrity of the cells that line the airways and digestive tract. It may also play a role in triggering immune cells into action. A-25 is formulated with a dry, water-soluble preparation of vitamin A palmitate. The palmitate form of vitamin A occurs naturally in fish, eggs, and dairy products.