D-Glucose is a simple sugar, or monosaccharide, that serves as a primary source of energy for living organisms. It is a six-carbon molecule with the chemical formula C₆H₁₂O₆. D-Glucose is naturally found in fruits, honey, and some vegetables, and it plays a crucial role in cellular respiration, where it is broken down to release energy. In the body, D-Glucose is transported through the bloodstream and taken up by cells with the help of insulin, a hormone produced by the pancreas. It can be stored as glycogen in the liver and muscles for later use. D-Glucose is also important in various metabolic pathways, contributing to the synthesis of other biomolecules.