Jarrow Formulas D-Ribose powder supports cellular energy muscle recovery and endurance. This ribose supplement provides 2 grams of d ribose per serving which is one of the necessary building blocks for the formation of ATP the universal ribose molecule in the body.(1) D-Ribose is the rate-limiting substrate in the synthesis of nucleotides and it promotes muscle recovery by replenishing ATP which is depleted by physical stress in cardiac and skeletal muscles.(1) This supplement is non-GMO vegan and gluten-free. Adults take one scoop one to three times a day with water or other fluid before or after exercise or as directed by your qualified healthcare professional. Jarrow Formulas– Superior Science. Smarter Formulas. (1)These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose treat cure or prevent any disease.