D-Ribose is a naturally occurring pentose (5-Carbon) sugar, which is a primary building block in the production of Adenosine Triphosphate (ATP) - the body"s main energy source, ATP levels can become severely depressed following periods of rigorous exercise and metabolic stress, Supplementing with D-Ribose may help replenish depressed levels of ATP, and improve workout recovery, Consider Healthy Origins 100% Natural CoQ10 in combination with D-Ribose for enhanced cardiovascular support, Natural and Non-GMO, Supports Muscle Recovery and Cardiovascular Health, BioEnergy Ribose, Dietary Supplement, Directions: Take one (1) level teaspoon once or twice daily, mixed with juice, or other beverage, May be taken with or without food, Other Ingredients: Free of salt, starch, yeast, wheat, gluten, soy, barley, fish, shellfish, nuts, tree nuts, egg and dairy products, No preservatives, artificial colors or artificial flavors, SKU: NEW6793