Also known as: D-Ribose
D-ribose is a molecule that is composed of five organic chemical subunits. It is the only carbohydrate that occurs in cells. It is found both inside and outside of cells. Inside it's used as an energy source for the body, which explains why it's found in all living things. One of the most common uses is restoring natural levels of D-ribose within the body, which can be depleted by chronic diseases.