Fuels ATP Energy Production Non-GMO Bioenergy Ribose A Dietary Supplement Vegetarian/Vegan GMP Quality Assured 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.