Yamano, Emi, Watanabe, Yasuyoshi, Kataoka, Yosky · International journal of molecular sciences · 2021 · DOI
ME/CFS is a serious condition that causes extreme exhaustion and is difficult to diagnose because we don't have reliable tests for it. This review examined research on how the chemicals in patients' bodies differ from healthy people, looking for patterns that could help doctors identify ME/CFS with a simple blood test. Scientists reviewed studies that measured these body chemicals and tested them in animal models to understand what goes wrong in ME/CFS.
Many ME/CFS patients struggle for years without diagnosis because no objective test exists; identifying reliable metabolic biomarkers could enable faster, more accurate diagnosis and guide development of targeted treatments. This review consolidates emerging metabolomic evidence that may accelerate the pathway from laboratory findings to clinical diagnostic tools that patients urgently need.
This review does not establish that any specific metabolite biomarker is ready for clinical use—it summarizes emerging evidence rather than providing definitive diagnostic validation. The findings represent correlations between metabolic changes and ME/CFS status but do not necessarily prove these metabolites cause the disease. Results from animal models may not directly translate to human patients due to differences in disease pathogenesis and study conditions.
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 →
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Primary citation
Yamano, Emi, Watanabe, Yasuyoshi, & Kataoka, Yosky (2021). Insights into Metabolite Diagnostic Biomarkers for Myalgic Encephalomyelitis/Chronic Fatigue Syndrome.. International journal of molecular sciences. https://doi.org/10.3390/ijms22073423
BibTeX
@article{mecfsatlas-yamano-2021-insights-into,
author = {Yamano, Emi and Watanabe, Yasuyoshi and Kataoka, Yosky},
title = {Insights into Metabolite Diagnostic Biomarkers for Myalgic Encephalomyelitis/Chronic Fatigue Syndrome.},
journal = {International journal of molecular sciences},
year = {2021},
doi = {10.3390/ijms22073423},
note = {PubMed: 33810365},
url = {https://www.mecfsatlas.com/evidence/yamano-2021-insights-into},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-30. https://www.mecfsatlas.com/evidence/yamano-2021-insights-into
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