Metal transporters are specialized proteins that facilitate the movement of metal ions across cell membranes. These proteins play a crucial role in maintaining metal ion homeostasis, which is essential for various biological processes, including enzyme function and cellular signaling. Different types of metal transporters exist, each responsible for specific metal ions, such as iron, copper, and zinc. They ensure that cells receive the necessary metals while preventing toxic accumulation. Dysfunction in these transporters can lead to various health issues, highlighting their importance in cellular health and metabolism.