ArticleActa neurologica Belgica2021
Effect of ketogenic diet versus regular diet on voice quality of patients with Parkinson's disease.
Article in Acta neurologica Belgica, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 2 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
22 citing papers in PubMed, 2 syntheses or guidelines pooled it, 39 citations in OpenAlex.
- Bibliometric analysis of dietary patterns in Parkinson's disease: from Mediterranean diet to emerging trends.Frontiers in aging neuroscience · 2026Pooled it
- Ketogenic interventions in mild cognitive impairment, Alzheimer's disease, and Parkinson's disease: A systematic review and critical appraisal.Frontiers in neurology · 2023Pooled it
- A randomized safety and feasibility crossover trial of two Mediterranean-ketogenic interventions in individuals with Parkinson's disease.Journal of Parkinson's disease · 2026Trial
- Anti-aging and Anti-inflammatory Dietary Interventions in Multiple Sclerosis: A Narrative Review.Neurology and therapy · 2026Review
- Redox therapy for neuropsychiatric disorders: Molecular mechanisms and biomarker development.Science advances · 2026Review
- The ketogenic diet in Parkinson's disease: mechanisms, evidence, and clinical practice.Frontiers in nutrition · 2026Review
- The ketogenic diet in Parkinson's disease: a potential therapeutic strategy.Pharmacological reports : PR · 2025Review
- Exploring the Facilitators and Barriers of Adherence to Mediterranean-Ketogenic Dietary Interventions in Parkinson's Disease: A Qualitative Study.Current developments in nutrition · 2025Article
- Effects of Ketogenic Diet on Quality of Life in Parkinson Disease: An Integrative Review.Nutrients · 2025Review
- Ketogenic Metabolism in Neurodegenerative Diseases: Mechanisms of Action and Therapeutic Potential.Metabolites · 2025Review
- Impact of the Ketogenic Diet on Neurological Diseases: A Review.Life (Basel, Switzerland) · 2025Review
- Thinking outside the brain: Gut microbiome influence on innate immunity within neurodegenerative disease.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2024Review
- Outcomes of dietary interventions in the prevention and progression of Parkinson's disease: A literature review.AIMS neuroscience · 2024Review
- The Role of Diet in Parkinson's Disease.Journal of Parkinson's disease · 2024Review
- Ketogenic diet protects MPTP-induced mouse model of Parkinson's disease via altering gut microbiota and metabolites.MedComm · 2023Article
- The Relationship of Ketogenic Diet with Neurodegenerative and Psychiatric Diseases: A Scoping Review from Basic Research to Clinical Practice.Nutrients · 2023Article
- Review
- The Role of Diet and Dietary Patterns in Parkinson's Disease.Nutrients · 2022Review
- The Interplay between Gut Microbiota and Parkinson's Disease: Implications on Diagnosis and Treatment.International journal of molecular sciences · 2022Review
- Effects of Ketogenic Diet on Neuroinflammation in Neurodegenerative Diseases.Aging and disease · 2022Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Diets that have effects on health problems can vary in their composition. Whilst following a regular diet (RD) a person typically consumes about 30% of calories from fat. Ketogenic diet (KD) is a form of diet whereby a person consumes as much as 90% of calories from fat. KD has been trialed as a treatment for neurological diseases and obesity. Parkinson's disease (PD) is a neurologic disease that impacts the quality of voice. Voice Handicap Index (VHI) is a test that gives information to clinical and physiological assessment about voice. We assessed the impact of KD and RD on voice quality (VQ). Seventy-four patients with PD who reported a voice disorder related to their disease were randomly assigned to the KD or RD groups. We investigated the VHI change of subjects before and 3 months after diet. Sixty-eight PD patients completed the study. Baseline VHI values did not differ significantly between groups. All mean VHI parameters improved in KD group (p˂ 0.001). Currently there are different therapies that address speech and voice disorders in patients with PD. As such KD may be an alternative therapy to improve VQ of patients with PD. A larger sample size is necessary to determine the role and pathophysiology of KD on VQ of PD patients.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.