Gerolsteiner Germany's most consumed Mineral Water. Rich in natural minerals Gerolsteiner Mineral Water originates from the Volcanic Eifel. Credit to the special combination of carbonic acid from earlier volcanic activity and the dolomite rock – known for its rich mineral content a Mineral Water of the highest quality is made possible. Gerolsteiner Sparkling contains valuable minerals like calcium magnesium and bicarbonate which is beneficial to the human body. One liter of Gerolsteiner Sparkling covers more than a quarter of your daily magnesium requirement (108 mgl) and even more than a third of the daily requirements for calcium (348 mgl).