An impaired sense of smell can signal cognitive decline, but ‘smell training’ could help (The Conversation):
“As we age, we often have problems with our ability to smell (called olfactory dysfunction). Older people might not be able to identify an odour or differentiate one odour from another. In some cases they might not be able to detect an odour at all.
Odour identification difficulties are common in people with neurodegenerative diseases, including Alzheimer’s disease [Read more…] about Study finds promise in smell training to harness neuroplasticity and improve brain health in older adults