GLUTs, or glucose transporters, are proteins that facilitate the transport of glucose and other sugars across cell membranes. They play a crucial role in regulating blood sugar levels and providing energy to cells. Different types of GLUTs are found in various tissues, each with specific functions and affinities for glucose. There are several types of GLUTs, such as GLUT1, GLUT2, and GLUT4, each serving distinct roles in the body. For example, GLUT4 is primarily found in muscle and fat tissues and is responsible for glucose uptake in response to insulin. Understanding GLUTs is essential for studying conditions like diabetes and metabolic disorders.