Harmon, D L, McMaster, D, McCluskey, D R et al. · Annals of clinical biochemistry · 1997 · DOI
This study looked at whether a specific genetic variant related to how the body processes folate (a B vitamin) is more common in people with ME/CFS compared to healthy controls. The researchers found that this particular genetic variation was not significantly more frequent in ME/CFS patients, suggesting this specific genetic factor is unlikely to be a major cause of the condition.
Given that metabolic abnormalities and micronutrient deficiencies have been implicated in ME/CFS pathogenesis, understanding whether genetic variations in folate metabolism contribute to disease risk is relevant. This negative finding helps clarify which genetic factors are unlikely to play a primary role, focusing future research on other potential mechanisms.
This study does not rule out the involvement of other genes in folate metabolism or other metabolic pathways in ME/CFS. It also does not demonstrate that folate supplementation would or would not be beneficial, as disease involvement may depend on gene-environment interactions rather than genetic variants alone.
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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