Calcium Aspartate is a bio-available soluble complex of Calcium l-Aspartic acid. A food fortified with minerals, makes sense if the nutrient is metabolizable.It is not only Calcium, but also particularly, the anion fraction (aspartate) of the ingested calcium source, which determines the bioavailability.The anion should be capable of physiological metabolism and be innocuous to the body. Both Calcium l-Aspartic acid are naturally available in human body.