Abnormal concentrations of calciotropic hormones (decreased 1,25(OH)2D3 and CT concentrations and increased PTH concentration) were noted at almost 4- or 2-fold lower Cd concentrations in the diet (15.56 mg/kg or/and 30.55 mg/kg) than that at which hypocalcaemia occurred (60.67 mg/kg) but not at 0.47 and 7.58 mg/kg [49]. The gene discussed is PTH; the disease is Hypocalcemia.