- Vitamin A is a fat-soluble vitamin. Fat-soluble vitamins (A, D, E, K) are absorbed with fats and stored in the body, unlike water-soluble vitamins which are generally not stored in significant amounts. - The liver is the main storage organ for Vitamin A. Approximately 90% of the body's Vitamin A reserves are stored in the liver in the form of retinyl esters. - Smaller amounts are also stored in adipose tissue, lungs, kidneys, and adrenal glands, but the liver holds the vast majority.