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Interpret Your Cortisol Results

Enter your Cortisol value below and get an instant, free AI interpretation — a plain-English explanation checked against WHO/IFCC reference ranges.

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This AI-generated interpretation is for educational purposes only and does not constitute medical advice, diagnosis, or treatment. Results may vary based on individual health factors not captured here.

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Cortisol Normal Ranges

Cortisol is the primary glucocorticoid hormone produced by the adrenal cortex under the influence of ACTH from the pituitary gland.

Age GroupReference RangeUnitNotes
Adults (18–64)6 – 23µg/dLMorning (8 AM)
Adults (18–64)2 – 12µg/dLAfternoon (4 PM)

Also reported in: nmol/L.

Critical (Panic) Values

Critical Low: < 2 µg/dL. Values outside these limits require immediate clinical attention.

Common Causes of High Cortisol

Cushing's disease (pituitary ACTH-secreting tumor — most common cause)Adrenal adenoma or carcinomaEctopic ACTH secretion (small cell lung cancer)

Common Causes of Low Cortisol

Addison's disease (primary adrenal insufficiency — autoimmune, TB, metastases)Secondary adrenal insufficiency (pituitary ACTH deficiency)Abrupt withdrawal of long-term corticosteroid therapy

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