Our research has determined Proper Wild's plant-based energy shot to be one of the cleanest formulations on the market. With its traceable, science-backed ingredients, this energy shot also provides long-term benefits from prolonged use. Another great option is Celsius, which uses natural flavors and sweeteners. Both of these energy drinks are moderate in their use of caffeine. When it comes to the healthiest energy drinks, it's important to ensure ingredients are from organic sources with little to no artificial preservatives or ingredients.