Ribose occurs naturally in all living cells. It is a simple sugar that begins the metabolic process for ATP production. D-Ribose works synergistically with, and enhances the benefits of, creatine supplements. Intense exercise causes a significant decrease in skeletal muscle energy levels. In fact, it can take 3 days or longer for these energy levels to recover! Recent studies show, however, that supplementing with high quality ribose hastens energy recovery in all types of skeletal muscles. This means you'll be able to work out longer and build muscle faster because you will recover quicker from intense workouts, having the energy to do more!