“Multistrain Probiotics Improve Bowel Movements in Parkinson’s Disease Patients, But Not Motor Functions:”

https://pubmed.ncbi.nlm.nih.gov/38116573

The study found that multi-strain probiotics consumption improved bowel movement frequency, consistency, and sense of complete evacuation in Parkinson’s disease patients, but it had no significant effect on motor functions within an 8-week period.