Impaired sense of smell (anosmia) is an early warning sign of neurodegenerative diseases, such as Alzheimer’s dementia, Parkinson’s disease, Korsakoff’s syndrome, Lewy-body dementia, HIV-related dementia, and multiple sclerosis. Anosmia may occur in other conditions, too, such as diabetes. Anosmia does not affect all patients with neurodegenerative illnesses, but it is nonetheless frequent enough to be…
