Over 4 500 years ago chinese manuscripts referred to green tea as a simple yet well known healthy plant yogi tea174 honours the age old traditions of harvesting preparing and sharing this life enhancing beverage it is our minimal harvesting of the plant39s leaves that give this tea its special potency green energy combines this fragrant potent green tea with kombucha and guarana a shrub native to the amazon basin of south america guarana seeds which contain some caffein