Too good to not share 
diagnosticimaging.com/view/...
MRI and PET Reveal Parkinson’s Is Two Diseases. Researchers have determined that Parkinson’s is, in fact, two distinct conditions – one that begins in the intestines and moves to the brain, and one that starts in the brain and migrates to the intestines and other organs.
Researchers also hypothesized that isolated REM sleep behavior disorder (iRBD) – a known risk factor for developing Parkinson’s – could be specifically associated with body-first disease.
Based on their results, they found some patients experience damage to the brain’s dopamine system prior to developing intestinal damage, but others manifest damage to the nervous system of the intestines and heart before the disease reaches the brain. In those cases, it might be beneficial, they said, to study the composition of intestinal bacteria. It has long since been demonstrated that Parkinson’s patients have a different microbiome in the intestines than healthy people, without us truly understanding the significant of this. doi.org/10.1093/brain/awaa238
The gut brain axis is connected through the vagus nerve, it is not either/or, you need heal both to recover health.
SE
Scientists discover new cell that could cure Alzheimer’s, MS, Parkinson’s and more 
Informative article with links re PD and Gut microbiome
Vascular Dysfunction in the Brain as an Initiating Event in Parkinson’s Disease
