Tomic, Slavica, Brkic, Snezana, Lendak, Dajana et al. · Turkish journal of medical sciences · 2017 · DOI
This study looked at hormone levels in 40 women with ME/CFS compared to 40 healthy women to see if hormonal imbalances might explain ME/CFS symptoms. While standard hormone tests showed mostly normal results, researchers found that cortisol (a stress hormone) didn't follow its natural daily rhythm in ME/CFS patients the way it does in healthy people, and thyroid hormone T3 was lower in the ME/CFS group. The findings suggest that ME/CFS may involve subtle disruptions in how the body regulates these hormones over time.
This research supports the hypothesis that ME/CFS involves neuroendocrine dysfunction, which is a leading biological explanation for the condition. Identifying disrupted cortisol rhythms as a potential biomarker could improve diagnosis and help researchers develop targeted treatments. Understanding these hormonal patterns may also validate the biological basis of ME/CFS for patients and clinicians.
This study does not establish that hormonal imbalance causes ME/CFS—only that differences exist. It cannot determine whether hormone dysregulation is a primary driver of symptoms or a consequence of the illness. The cross-sectional design means researchers measured hormones at one point in time, so they cannot assess how these patterns change over the course of illness or treatment.
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 →
Contribute
Private, reviewed by a human. Not a public comment thread.