Vitamin A 1200mcg - Food supplement which provides 1200 mcg of Vitamin A, suitable in case of reduced dietary intake or increased requirements. Vitamin A contributes to the normal function of the immune system and to the maintenance of normal skin and vision. Science understands the role of vitamin A above all in relation to its effects on the visual apparatus. The human retina has four types of photo pigments containing vitamin A. Bad adaptation to changes in brightness and poor night vision are some of the initial symptoms of vitamin A deficiency