A Narrative Review on Gut Microbiome Disturbances and Microbial Preparations in Myalgic Encephalomyelitis/Chronic Fatigue Syndrome: Implications for Long COVID. — ME/CFS Atlas
A Narrative Review on Gut Microbiome Disturbances and Microbial Preparations in Myalgic Encephalomyelitis/Chronic Fatigue Syndrome: Implications for Long COVID.
Jurek, Joanna Michalina, Castro-Marrero, Jesus · Nutrients · 2024 · DOI
Quick Summary
This review examines how changes in gut bacteria may contribute to ME/CFS and long COVID symptoms, and whether taking probiotics or similar microbial preparations might help. The authors looked at existing research to understand the connection between gut health and the brain-immune system, and whether restoring healthy gut bacteria could reduce fatigue, inflammation, and other symptoms in these conditions.
Why It Matters
This review is important because it consolidates emerging evidence linking gut dysbiosis to ME/CFS pathophysiology and explores whether accessible microbial interventions could address multiple symptoms simultaneously. For patients and clinicians, it provides a comprehensive framework for understanding how gut-brain-immune interactions may drive disease and suggests potential management strategies that warrant further investigation.
Observed Findings
- Altered gut microbiota composition is documented in both ME/CFS and long COVID patient populations
- Dysbiosis is associated with immune dysregulation, chronic inflammation, and neuroinflammatory markers
- Disrupted microbiota may impair intestinal barrier function and contribute to neuropsychiatric symptoms
- Microbial preparations have been studied as potential modulators of the brain-immune-gut axis
- Probiotic use is associated with potential benefits for fatigue, gastrointestinal, and inflammatory symptoms in some studies
Inferred Conclusions
- Gut dysbiosis appears to be a consistent feature of ME/CFS and long COVID, suggesting microbiota disturbance contributes to pathophysiology
- Restoring healthy microbiota composition through probiotics, synbiotics, or postbiotics may help manage multiple symptom domains
- Microbial preparations combined with nutraceuticals warrant investigation as adjunctive symptom management strategies
- The brain-immune-gut axis represents a relevant therapeutic target in these conditions
Remaining Questions
Which specific probiotic strains or combinations are most effective for ME/CFS patients, and what are optimal dosing and duration protocols?
What This Study Does Not Prove
This narrative review does not establish causation between gut dysbiosis and ME/CFS symptoms—associations may be bidirectional or reflect secondary effects of illness. The review does not provide definitive clinical evidence that probiotics or related preparations effectively treat ME/CFS or long COVID; it identifies promising avenues requiring rigorous randomized controlled trials. Individual probiotic efficacy varies, and this review cannot determine which specific preparations or combinations are most beneficial.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →