GLUT3 is a type of glucose transporter protein found primarily in the brain and other tissues with high energy demands. It plays a crucial role in facilitating the uptake of glucose, which is essential for cellular energy production. GLUT3 is known for its high affinity for glucose, allowing it to effectively transport this vital nutrient even when glucose levels are low. This transporter is encoded by the SLC2A3 gene and is part of the larger family of glucose transporters. GLUT3 is particularly important for neurons, as they rely heavily on glucose for proper function. Dysfunction in GLUT3 can lead to various neurological issues, highlighting its significance in maintaining brain health.