What 6 carbon sugar serves as the primary fuel for metabolism in all living things?

Glucose is the 6 carbon sugar serves as the primary fuel for metabolism in all living things. According to Merriam dictionary, glucose is a type of sugar that is found in plants and fruits. It has a molecular formula of C₆H₁₂O₆. It also circulates in the blood of animals as blood sugar. It is made during photosynthesis from water and carbon dioxide, using energy from sunlight.