In calcium pidolate, the calcium ion is bound to two molecules of pyrrolidone carboxylic acid that act as protein supports. None of the calcium salts currently employed therapeutically (chloride, carbonate, lactate, gluconate, glucoheptonate, gluconolactate, gluconogalactogluconate, lactobionate, etc.) contain a protein support. Calcium pidolate is the only drug in which the calcium is transported by a protein substrate that is directly assimilable and specific to the body's bony matrix. Calcium pidolate can help the body's own calcium in performing its two primary roles: in any adverse changes in bony tissue during its growth, during bone ageing or traumatic bone lesions, Calcium pidolate can provide both a protein framework and a mineral source, as regards various metabolic functions of calcium, calcium pidolate have demonstrated that the substance is perfectly absorbed and distributed throughout various tissues and that it stimulates numerous hormonal and metabolic activities. In the treatment of various forms of osteoporosis with calcium pidolate, it is used curatively.