The primary source of energy for all cellular processes is a molecule known as ATP (adenosine triphosphate). Healthy, active cells constantly replenish their supply of ATP to produce vital cellular energy.1 However, under conditions of stress, injury, or aging, critical body tissues such as heart and skeletal muscles cannot produce ATP quickly enough to perform optimally. D-ribose, a carbohydrate molecule found in every living organism, facilitates the production of ATP. In studies of healthy athletes, supplying fatigued muscle cells with D-ribose quickly restored ATP levels to normal.3-6 By helping to rapidly refill depleted energy stores, D-ribose may be especially beneficial for heart health. D-Ribose Tablets and D-Ribose Powder can help speed energy recovery, increase energy reserves and maintain healthy energy levels in heart and muscle tissue. This product is labelled to United States standards and may differ from similar products sold elsewhere in its ingredients, labeling and allergen warningsD-Ribose Caps and D-Ribose Powder can help speed energy recovery, increase energy reserves, and maintain healthy energy levels in heart and muscle tissue.*Calories 20, Total Carbohydrates 5 g, Sugars 5 g, Bioenergy RIBOSE™ (Non-GMO D-Ribose) 5000 mg,Follow usage directions on label.WARNING: Consuming this product can expose you to chemicals including lead, which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov/food.Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.