Simply put Unicorn Fuel is the best Natural energy drink I have found.  I use it before workouts and as a coffee replacement in the morning.  I have found that its better to use Unicorn Fuel to get my mornings going rather than putting acidic coffee on my stomach which could lead to leaky gut.  
Unicorn Fuel derives it caffeine from Green Tea. It can enhance your energy, improve your reaction time, increase focus and reduce your fatigue.  
It contains Quercetin which is a phytonutrient that's know to improve exercise performance and recovery.  It's also helps increase the production of mitochondria - the "powerhouses" of our cells.