If you are wanting to go natural then an energy drink isn't the best way to go. Even if there is no caffeine in the drink it is packed with sugar. If you are looking for an energy drink it is best to make your own at home. You will add all natural ingredients to a juicer and know what you are drinking. I stopped buying all types of juices, flavored water, and soft drinks in the store years ago. They have way too much sugar and other things added to them. It is best to buy your own fruit and vegetables and make your own drinks. They are healthy for you and give you more energy than energy drinks do.
Furthermore, an energy drink will boost your energy level for a few hours and when it wears off you go crashing down and are so tired. This is hard on your body and another reason to not drink them. Your own energy drinks made at home will give you plenty of energy and keep you healthy at the same time.