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Updated: Oct 30, 2025

Author Spotlight: Exploring Non-Motor Symptoms in Parkinson's Disease
Published on: September 22, 2023
The Role of The Gut Microbiome in Parkinson's Disease
Amy Gallop1, James Weagley2, Saif-Ur-Rahman Paracha1
1Department of Psychiatry and Behavioral Neuroscience, 7547Saint Louis University, MO, USA.
Abstract:
The gut microbiota is known to play a role in various disease states through inflammatory, immune and endocrinologic response. Parkinson's Disease is of particular interest as gastrointestinal involvement is one of the earlier features seen in this disease. This paper examines the relationship between gut microbiota and Parkinson's Disease, which has a growing body of literature. Inflammation caused by gut dysbiosis is thought to increase a-synuclein aggregation and worsen motor and neurologic symptoms of Parkinson's disease. We discuss potential treatment and supplementation to modify the microbiota. Some of these treatments require further research before recommendations can be made, such as cord blood transplant, antibiotic use, immunomodulation and fecal microbiota transplant. Other interventions, such as increasing dietary fiber, polyphenol and fermented food intake, can be made with few risks and may have some benefit for symptom relief and speed of disease progression.
Insights
The gut microbiota influences Parkinson's Disease (PD) progression. Gut dysbiosis may worsen PD symptoms, but dietary changes like increased fiber may offer benefits.
Area of Science:
- Neuroscience
- Microbiology
- Gastroenterology
Background:
- The gut microbiota plays a role in various diseases via inflammatory, immune, and endocrinologic responses.
- Gastrointestinal involvement is an early feature of Parkinson's Disease (PD).
- A growing body of literature suggests a link between gut microbiota and PD.
Purpose of the Study:
- To examine the relationship between gut microbiota and Parkinson's Disease.
- To discuss potential treatments and supplementation strategies for modifying the gut microbiota in PD.
Main Methods:
- Literature review examining the connection between gut microbiota and PD.
- Discussion of various interventions targeting the gut microbiota.
Main Results:
- Gut dysbiosis-induced inflammation may increase alpha-synuclein aggregation, worsening PD motor and neurologic symptoms.
- Some interventions like cord blood transplant, antibiotics, immunomodulation, and fecal microbiota transplant require further research.
- Dietary interventions including increased fiber, polyphenol, and fermented food intake show potential benefits with minimal risk.
Conclusions:
- Modifying the gut microbiota is a potential therapeutic avenue for Parkinson's Disease.
- Dietary interventions offer a low-risk approach to potentially alleviate PD symptoms and slow disease progression.
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