Which of the following does the liver store?

The liver plays a crucial role in metabolism and plays a vital part in the storage of various substances required for the body’s functions. One of the key functions of the liver is to store iron and certain vitamins, particularly the fat-soluble vitamins A, D, E, and K. Iron is stored in the liver in the form of ferritin, which is essential for red blood cell production and overall metabolism.

The liver's ability to store these nutrients allows the body to maintain adequate levels for times of increased need and assists in regulating the distribution of iron and vitamins throughout the body. Additionally, when the body requires these stored substances, the liver can release them into the bloodstream as needed, ensuring that metabolic processes function smoothly.

Other choices include substances that either are not primarily stored in the liver or do not reflect its main storage functions.