McNab's Supercharge Shot Guarana Berry is a plant-based caffeine blend of natural ingredients and vitamins that delivers a healthy instant energy boost. Filled with nature’s best pick-me-ups, this product is easy to use and easy to carry. This natural-energy instant boost contains only the best ingredients including Guarana Berry providing a natural caffeine plant based energy without the crash. SuperCharge Energy shots can be taken throughout the day, whenever you feel in need of a mental and physical boost. However, if you are in anyway sensitive to caffeine, consumption should be moderated according to your tolerance.