E0 ConsensusModerate confidencePEM not requiredSystematic-ReviewPeer-reviewedMachine draft
Standard · 3 min
Fatigue and exposure to mold and/or dampness: A systematic review of the literature from 2011-2018.
Dooley, Ming, McMahon, Scott W · Environmental analysis, health and toxicology · 2025 · DOI
Quick Summary
This review looked at research studies from 2011-2018 that examined whether exposure to mold and damp environments is linked to fatigue. Researchers analyzed six high-quality studies involving over 41,000 people and found consistent evidence that living or working in moldy or damp spaces is associated with fatigue. The findings suggest that improving indoor air quality and reducing mold exposure may help reduce fatigue symptoms.
Why It Matters
For ME/CFS patients, this review is significant because environmental factors like mold and dampness exposure may contribute to or exacerbate fatigue symptoms. Understanding these environmental triggers could inform management strategies and help patients identify modifiable risk factors in their living spaces. This work bridges environmental health and post-infectious illness research, areas increasingly relevant to understanding ME/CFS pathophysiology.
Observed Findings
98.2% (112 of 114) of epidemiological articles from 2011-2018 supported an association between mold/dampness exposure and health symptoms
One study showed very high methodological support for the mold-fatigue association
Three studies demonstrated moderately high support for this association
Collective analysis included over 40,000 participants across cross-sectional studies
One case-control study with 95 cases and 110 controls supported the association
Inferred Conclusions
Indoor mold and dampness exposure is significantly associated with fatigue symptoms across multiple study populations
Improved methodology and evidence quality do not diminish the strength of the mold-fatigue association
Enhanced awareness and environmental interventions targeting mold and dampness may help reduce fatigue in affected populations
The consistency of findings across diverse study designs suggests a robust association worthy of further investigation
Remaining Questions
Does mold exposure directly cause fatigue, or does it exacerbate underlying conditions like ME/CFS?
What This Study Does Not Prove
This review establishes association but not causation—we cannot conclude that mold exposure directly causes fatigue or ME/CFS. The studies included were primarily cross-sectional, limiting causal inference. The review does not clarify whether mold exposure triggers new-onset ME/CFS, worsens existing symptoms, or causes isolated fatigue distinct from ME/CFS.
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 →