Diets that are deficient in vitamin A are now common because of poor dietary habits and the depletion of vitamin A in processed foods. But vitamin A is vital for eye health, particularly for night vision.* And vitamin A is also essential for healthy immune function.* It also promotes a healthy GI mucosal barrier and supports the normal function of white blood cells, including neutrophils, macrophages, and natural killer cells.* Other important functions of vitamin A include supporting healthy bone growth, promoting normal cellular differentiation and growth, and maintaining healthy skin.* Thorne’s Vitamin A is formulated from the purest possible ingredients and contains 25,000 IU per capsule.