Many people have trouble maintaining energy throughout the day. On some days it can seem that as soon as you wake up you're already lacking energy, while on other days a lack of energy may not hit until the afternoon. There are a number of ways to support energy, like coffee or an energy drink, but these substances may cause negative side effects. D-Ribose is used by the cells to produce adenosine triphosphate (ATP). ATP helps to provide energy to the cells. It may help to energize the body throughout the day.