Alzheimer's disease has long been thought to be irreversible, but new research challenges this assumption[content]. Scientists have found that severe declines in the brain's energy supply contribute to the onset of the disease[content]. Restoring this balance can reverse the damage even in advanced cases[content]. In mouse models, the treatment corrected brain pathology[content]. The treatment also restored cognitive function and normalized biomarkers of Alzheimer's disease[content]. The results provide new hope that recovery is possible[content].