Cutting Edge Labs D-Ribose CEL Ribose helps boost endurance, increase energy, and promote workout recovery. Ribose does not affect blood sugar levels. What is D-Ribose D-Ribose, or Ribose is a carbohydrate vital for the body's manufacture of ATP adenosine triphosphate, which is the major source of energy used by our cells. Studies show that muscle replenishes ATP more quickly when you supplement with ribose. What is Ribose Used For CEL Ribose can be used to produce glucose and glycogen the storage form of carbohydrate energy. When oxygen is available, ribose can be converted into pyruvate, another energy source. Most importantly, ribose is necessary for the ATP production. With CEL Ribose, cells can recover rapidly from intense exertion.Suggested Use:Directions: As a dietary supplement, for adults, take four 4 capsules two to four times daily or as directed by a physician.Product Facts:Supplement Facts: Serving Size 4 capsules Servings Per Container 30 Amount Per Serving Pure D-Ribose