The chemical formula for glucose is C6H12O6. Glucose is a simple sugar and an essential carbohydrate in biology, serving as a primary source of energy for living organisms. It is produced through the process of photosynthesis in plants, where carbon dioxide and water are converted into glucose and oxygen, using sunlight energy. In humans and many other organisms, glucose is metabolized to provide energy through cellular respiration. Glucose levels in the blood are closely regulated; imbalances can lead to conditions such as diabetes. This hexose is also critical in the synthesis of other biomolecules, making it vital for metabolism.