Composed mainly of green tea leaves, Energy tea is very effective in increasing physical and mental performance. The caffeine contained in green tea stimulates brain activity as well as the metabolism. The eleuthero root,commonly called Siberian ginseng, boosts the tired body or helps with recovery and improves concentration. The yerba mate leaves serve as a tonic for the nerves, muscles and stimulates digestive functions. It is recommended to drink it when tired and after waking up in the morning.