Vitamin A ELISA kits are assays designed to detect the vitamin A group of compounds. Vitamin A includes retinol, retinol, and carotenoids. These play a role in metabolism, immune system function, maintenance of healthy skin, vision, and bone formation. Retinol is essential for the development of the retina through formation of rhodopsin. Carotenes and xanthophyll are found largely in plants, where they function as provitamin A for herbivores. Deficiencies in vitamin A compounds can cause night blindness, while increased levels can cause toxicity, which is especially harmful during pregnancy. Visit the supplier page for more information about detection range and reactivity.