Abstract: A haemodialysis machine retrofit and control installation including an intake-flow blood glucose sensor and an intake-flow blood glutamine sensor, a return-flow blood glucose sensor and return-flow blood glutamine sensor, a dialysate glucose- and glutamine controller, a central control unit connected to the blood glucose- and glutamine sensors, the dialysate glucose- and glutamine controllers for regulating the glucose and glutamine levels in the dialysate to obtain required blood-glucose and glutamine concentrations at the return-flow blood glucose- and glutamine sensors and an electroencephalograph (EEG) monitor providing the central control unit with information pertaining to spontaneous electro-cerebral activity to initiate raising of glucose and glutamine levels. Also disclosed is a method of treating a proliferative disorder in a human or animal, by reducing via a retrofitted haemodialysis machine blood-glucose or glutamine concentrations in the human or animal body for a pre-defined period of time.