The nose or the gut? For the past two decades, the scientific community has debated the wellspring of the toxic proteins at the source of Parkinson's disease. In 2003, a German pathologist, Heiko Braak, MD, first proposed that the disease begins outside the brain.
New hypothesis emerges on Parkinson's disease's origins and spread retrieved 11 April 2024 from https://medicalxpress.com/news/2024-04-hypothesis-emerges-parkinson-disease.html
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