The sense of smell declines sharply in the early stages of Alzheimer’s, and administering a simple “sniff test” can enhance the accuracy of diagnosing the disease as well as a pre-dementia condition called mild cognitive impairment (MCI), finds University of Pennsylvania researchers.

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The sense of smell declines sharply in the early stages of Alzheimer’s, and administering a simple “sniff test” can enhance the accuracy of diagnosing the disease as well as a pre-dementia condition called mild cognitive impairment (MCI), finds University of Pennsylvania researchers.