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Undermining the sense of smell not only can be the primary symptom of Parkinson's disease, Alzheimer's disease also affects parts of the brain that are related to smell detection. A study in 2016 found that testing for common odors such as cigarettes, coffee, etc. in patients could help identify Alzheimer's.
9 Signs That Say Your Brain Is Older than You
Undermining the sense of smell not only can be the primary symptom of Parkinson's disease, Alzheimer's disease also affects parts of the brain that are related to smell detection. A study in 2016 found that testing for common odors such as cigarettes, coffee, etc. in patients could help identify Alzheimer's.