Nutritional Intervention for Constipation Symptoms in Patients With Parkinson's Disease
Recruiting now · Not applicable
Conditions studied: Parkinsons Disease (PD), Constipation - Functional
In brief
The goal of this clinical trial is to evaluate whether a dietitian-guided nutritional intervention can improve constipation symptoms in people with Parkinson's disease (PD). The main questions it aims to answer are: * Can a dietitian-guided nutritional intervention increase the number of weekly bowel movements in individuals with PD and functional constipation? * Can this intervention positively influence gut microbiota composition, dietary intake, and nutritional status? Researchers will compare the intervention group to a control group that will receive general dietary guidance only after the study period, to see if the intervention leads to improvements in bowel function and related health outcomes. Participants will: * Follow a diet plan developed by a dietitian, based on dietary reference intakes and tailored to the needs of individuals with PD and constipation * Participate in follow-up sessions with the dietitian for 3 months * Complete assessments at baseline, midpoint, and end of the intervention to evaluate bowel function, constipation symptoms, gut microbiota, nutritional status, and diet quality
Key facts
- Study ID
- NCT07213856
- Run by
- Hospital de Clinicas de Porto Alegre
- People needed
- 54
- Starts
- 2026-04-02
- Expected to finish
- 2029-08-01
- Last updated by the study team
- 2026-06-16
Who can join
Age: 18 and older. Sex: any. Healthy volunteers: not accepted.
You may qualify if…
- Adults with a previous diagnosis of Parkinson's disease
- On a stable dose of levodopa for at least 3 months
- Diagnosis of Functional Constipation by the Rome IV protocol
You may not qualify if…
- Diagnosis of atypical or secondary parkinsonism
- Hoehn and Yahr stage greater than 2
- Presence of severe neurological or psychiatric disorders that impair the ability to participate in study procedures
- Previous diagnosis of dementia
- Presence of comorbidities such as active cancer, chronic obstructive pulmonary disease (COPD), heart failure, and/or chronic kidney disease
- History of gastrointestinal cancers, inflammatory bowel diseases, or surgeries involving the gastrointestinal tract
- Constipation secondary to clinical conditions such as hypothyroidism or diabetes mellitus
- Use of opioids
- Use of probiotics or antibiotics in the past 8 weeks
- Continuous use of laxatives in the past 8 weeks
- Presence of severe dysphagia according to the Functional Oral Intake Scale (FOIS)
- Individuals receiving enteral or parenteral nutrition
- Individuals under nutritional follow-up in the past 3 months
Where it is running
- Hospital de Clínicas de Porto Alegre (HCPA) — Porto Alegre, Rio Grande do Sul, Brazil (enrolling)
Full record on ClinicalTrials.gov
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