Which phrase correctly defines an ion in the context of nutrition and physiology?

A neutral molecule formed when two vitamins bind and share electrons to change their solubility in water.

An atom that has gained or lost electrons and therefore carries a positive or negative electrical charge.

A lipid particle responsible for transporting fat-soluble vitamins through the lymphatic system into circulation.

A large proteinaceous hormone secreted by endocrine glands that binds minerals and displaces their electron shells without altering electric charge.