Tru Alka, through its proprietary formula, begins with water which has been intensely purified. We then add back in minerals of calcium, magnesium and potassium.Now here is the key... The minerals added are NANO in proportion compared to the size of minerals that we currently drink in any water which contains these same minerals. Tru Alka uses mostly calcium along with potassium and magnesium versus a large assortment of minerals.