Impaired smell in later life can be an early warning of neurodegenerative and heart diseases, research suggests

Olfactory tests could help doctors spot older adults who are at greater risk of developing dementia, researchers say.

The sense of smell is known to deteriorate with old age, and research has previously found this might indicate underlying health problems that could result in a greater chance of death in the near future.

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Read More Routine sense of smell tests could be used to spot signs of dementia

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