Fast dissolving edible solid nutritional supplement compositions having one or more calcium mineral sources, a citric and malic acid component, and an edible carbon dioxide-generating bicarbonate component in an amount sufficient to aid in dispersing the calcium mineral source but without inhibiting the chelate complex formation between the calcium mineral source(s) and the citric and malic acid component. Each of the calcium mineral source(s), the citric and/or malic acid component and bicarbonate component have at least about 90% particulates with a particle size of less than about 74 microns. Also, a method for preparing these compositions.
