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Reduced sense of smell
Reduced sense of smell
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If you’re having trouble smelling pungent foods or no longer pick up your favourite scents, see a doctor. It’s not the most common symptom of Parkinson’s, but Dr. Hall says patients who suffer a loss of smell report it being the earliest sign they experience. The link between reduced sense of smell and Parkinson’s isn’t clear, but one theory is that the clumps of the protein alpha-synuclein, found in the brains of all Parkinson’s patients, may form in the part of the brain responsible for smell before migrating to other areas and affecting motor function.

Discover 12 diseases that doctors can actually diagnose through smell. 

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