I can’t specifically address that theory but I can say PD caused major problem with my entire gastrointestinal system as one of my initial major PD symptoms .

There is definitely a connection between the gut and Parkinson’s disease, via the vagus nerve, and it’s getting growing attention. Check out this well-written article in The Washington Post: https://www.washingtonpost.com/wellness/2024/09.... Be well! Peggy

I am pretty sure there is a connection if not the Vargas nerve then somewhere in the gut is where it begins!

I believe that to be true as well many articles have been coming out about the Vargas nerve and PD it’s looking like it is

"Dr. Petrossian noted this is a more recent theory about the development of Parkinson’s via the gut.

“Prior to that, the theory was that environmental factors contributed to toxins entering through the noseTrusted Source, through the olfactory nerveTrusted Source to the olfactory bulbTrusted Source, and then directly back to the brainstem from there. So, these days, I think the consensus is that there’s probably a mix of where Parkinson’s comes from. For some people, it starts in the gut, and for others, it starts from the olfactory bulb.”

– Dr. Melita Petrossian, neurologist"
https://www.medicalnewstoday.com/articles/parki...

Parkinson’s may start from bacteria in the gut, researchers say

https://www.medicalnewstoday.com/articles/parkinsons-may-start-from-bacteria-in-the-gut