Now Sports D-Ribose – Fuels ATP Energy Production! Non-GMO & May Help Stabilize Energy Levels In Improve Heart And Skeletal Muscle!Fuels ATP Energy 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. Note: Manufacturers continually change product specifications. While we try our best to keep product descriptions up to date, they do not necessarily reflect the latest information available from the manufacturer. We are not responsible for incorrect or outdated product descriptions and/or images.