SLC2A3, also known as the glucose transporter type 3 (GLUT3), is a protein that facilitates the transport of glucose across cell membranes. It is primarily expressed in the brain, placenta, and other tissues where glucose is a critical energy source. This transporter plays a vital role in maintaining glucose homeostasis, ensuring that cells receive the necessary energy to function properly. Mutations or dysregulation of SLC2A3 can lead to various health issues, including hypoglycemia and neurological disorders. Understanding the function of SLC2A3 is important for developing potential treatments for conditions related to glucose metabolism and energy deficiency in cells.