Glucose is an important sugar that serves as the primary fuel for energy production in the body, especially the brain, muscles, and other organs. It can be obtained from foods or made by the body from other substances. Glucose acts as a building block for larger molecules like glycoproteins and glycolipids. It is the main type of sugar found in blood and is carried throughout the body via the bloodstream. Glucose plays several key biological roles, including serving as the product of photosynthesis in plants and as an intermediate for cellular respiration. It circulates in the blood as blood sugar and is transported to tissues, being stored as glycogen in the liver and muscles. The brain relies on glucose as its preferred