Aquamin Mg Soluble is produced by the reaction of seawater-derived magnesium oxide with citric acid, which renders it soluble in aqueous systems. With a magnesium content minimum 10 percent, it is a highly bioavailable source of 72 minerals. Aquamin MG Soluble is best suited for use in food, low pH (3.0 – 6.0) beverages, and nutraceuticals.