Ribose supports heart and skeletal muscle energy metabolism. Ribose, a monosaccharide sugar found in all living cells, plays a critical role in cellular metabolic pathways that generate energy. It supports normal heart muscle function and may also support normal skeletal muscle function during exercise and in people with certain muscular dystrophies or fibromyalgia. As a fundamental constituent of adenosine triphosphate (ATP), Ribose is essential for normal energy production.