Calcium D-Saccharate also known as Calcium D-Glucarate is used as a stabilizer for Calcium Gluconate solution for parenteral application.  It is also used for fortification of foods and as an intermediate for manufacturing of other saccharate salts.  Example, for manufacturing of Dextroamphetamine Saccharate.

L-Pidolic Acid occurs in plants and is a natural constituent of a number of foods.  Calcium in form of pidolates is thus a widely accepted calcium supplement for food & pharma industries.  Due to its high solubility Calcium Pidolate is supplement of choice in liquid beverages and health drinks. 

Calcium Orotate is known to have highest bioavailibility among all organic minerals of calcium.  It is used in pharmaceutical industry in form of tablet & chewable.  Nutritional Lozenge for treatment of osteophorosis, osteomalacia & in all conditions for treatment of low calcium.

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 bioavailibility.  The anion should be capable of physiological metabolism and be innocous to the body.  Both Calcium L-Aspartic acid are naturally available in human body.  These requirements are met by aspartate.