5000 MG Muscle Fuel* ATP Production* Ribose is a simple sugar that occurs naturally in all living cells. Ribose is the structural backbone of ATP, the primary form of energy used for all cellular processes.* Demand for ATP availability is especially critical in the heart and skeletal muscle and ribose supplementation can help to maintain optimal energy levels in these tissues.* Bioenergy RIBOSE® is a registered trademark of Bioenergy Life Science, Inc. Use of ribose is licensed by Bioenergy Life Science, Inc. under U.S. patents and foreign patents issued and pending. Natural color variation may occur in this product. This product is sold by weight not volume.