Other ingredients include extracts of chamomile, a daisy-like plant with "a calming agent to fend off stress ... and ease digestion", passiflora, a genus of about 500 species of flowering plants with "anti-depressant and relaxing" properties, valerian, a herb that "relieves symptoms of nervousness", Tilia cordata, a linden tree known for "facilitating sleep", and hops, a "nerve calming" flowering plant.
Hops (humulus lupulus) were introduced to the area in about 1820; by 1875, Waterville was considered the "Hops Capital of the World."