Wyller, Vegard Bruun, Evang, Johan Arild, Godang, Kristin et al. · Acta paediatrica (Oslo, Norway : 1992) · 2010 · DOI
Researchers compared hormones in 67 adolescents with ME/CFS to 55 healthy teenagers and observed that ME/CFS patients had lower levels of a hormone that helps regulate body water balance (antidiuretic hormone) and higher salt-regulating activity. Other hormones examined—including cortisol and sex hormones—did not differ significantly between the groups. These findings suggest that ME/CFS may be associated with altered control of body fluid balance, though this is an early observation from one study and requires further research.
This study provides preliminary evidence that ME/CFS in adolescents is associated with alterations in hormonal systems that regulate body fluid and blood volume—systems not commonly measured in ME/CFS research. If replicated, these findings could point toward novel physiological pathways relevant to understanding ME/CFS pathophysiology and may inform investigation of symptoms such as orthostatic intolerance.
This case-control study does not establish causation or mechanistic pathways. It does not confirm that hormonal alterations are the root cause of ME/CFS, only that they are statistically associated with the diagnosis in this adolescent sample. The findings are not a treatment recommendation and require replication in other cohorts before drawing population-level conclusions.
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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