Royal t-Stick uses natural aromas in its tea. Natural aromas always have a natural origin. This means that the aroma has its origins in nature.
The aroma is obtained through a fermentation process. And this can be done with anything. Think of fruit peels, natural oils, blossoms, etc. A misconception is that flavorings are added to sweeten the tea. In all cases, flavorings do not contain sugar or calories and do not sweeten the tea. The only reason that a tea might contain sugar is that sugars are naturally present in the added ingredient