text: Vitamin A is a fat soluble vitamin and depends on micellar solubilization for dispersion into the small intestine , which results in poor use of vitamin A from low-fat diets . Zinc deficiency can also impair absorption , transport , and metabolism of vitamin A because it is essential for the synthesis of the vitamin A transport proteins and as the cofactor in conversion of retinol to retinal .
simplified: Vitamin A is a vitamin .