Plioplys, A V, Plioplys, S · Neuropsychobiology · 1995 · DOI
This study looked at carnitine, a substance that helps cells produce energy. Researchers found that people with ME/CFS have lower levels of carnitine in their blood compared to what would be expected. They also discovered that patients with higher carnitine levels reported better ability to function in daily life, suggesting a link between this energy-related chemical and symptom severity.
Understanding potential metabolic abnormalities in ME/CFS is crucial for identifying disease mechanisms and developing targeted treatments. The correlation between carnitine levels and functional capacity suggests this biomarker may help explain the energy production deficits underlying fatigue and could guide future intervention research.
This study does not prove that low carnitine causes ME/CFS symptoms—it only shows an association. The cross-sectional design cannot establish cause and effect, and without a control group or mitochondrial function testing, the study cannot definitively confirm mitochondrial dysfunction as the underlying mechanism. Carnitine supplementation as a treatment remains unproven by this work.
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 →
The first block is for the primary paper and is the citation you should use in research work. The atlas-snapshot line only applies if you are specifically referring to this atlas’s reading of the paper on the date shown.
Primary citation
Plioplys, A V & Plioplys, S (1995). Serum levels of carnitine in chronic fatigue syndrome: clinical correlates.. Neuropsychobiology. https://doi.org/10.1159/000119226
BibTeX
@article{mecfsatlas-plioplys-1995-serum-levels,
author = {Plioplys, A V and Plioplys, S},
title = {Serum levels of carnitine in chronic fatigue syndrome: clinical correlates.},
journal = {Neuropsychobiology},
year = {1995},
doi = {10.1159/000119226},
note = {PubMed: 8544970},
url = {https://www.mecfsatlas.com/evidence/plioplys-1995-serum-levels},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-25. https://www.mecfsatlas.com/evidence/plioplys-1995-serum-levels
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