Which organ is primarily responsible for removing and storing fat-soluble vitamins?

• A. Liver
• B. Kidney
• C. Stomach
• D. Lungs

Answer: (A)

Fat-soluble vitamins A, D, E, and K rely on fat for absorption and are stored in the body for longer periods. The liver acts as the primary hub where these vitamins are taken up from the bloodstream, metabolized, and stored for later use (for example, retinol stores in the liver and vitamin D precursors are handled there). This storage helps maintain a reservoir of these nutrients since they aren’t easily excreted and can be mobilized when the body needs them. The kidneys mainly handle water-soluble vitamins and their excretion, not storage, while the stomach is involved in digestion and the lungs have no role in vitamin storage. Thus, the liver is the key organ responsible for removing excess fat-soluble vitamins from circulation and storing them.