Fatigue Due to Endocrine or Metabolic Dysfunction

This cause is confirmed by blood panel analysis identifying abnormalities in endocrine markers. Diagnostic indicators include TSH and Free T4 levels outside of the established reference range (suggesting thyroid dysfunction) or HbA1c levels indicating poor glucose regulation (suggesting diabetes). Kidney and liver function tests, such as eGFR, creatinine, and ALT levels, are also used to rule out systemic metabolic impairment.

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