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Cortisol, Morning

Published: July 27, 2026Updated: August 25, 2026

This biomarker measures the level of cortisol, a hormone produced by the adrenal glands, in the blood during the morning hours.

Quick summary

Morning cortisol levels help diagnose conditions related to adrenal function.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 25, 2026Editorial policy

Key facts at a glance

Units
μg/dL
Clinical utility
diagnostic
Result kind
quantitative
FDA-cleared
Roche Cortisol, Abbott Cortisol, Siemens Cortisol
interpretation: {"text":"Levels below 6.2 μg/dL may indicate adrenal insufficiency, such as Addison's disease.","label":"Low"}; {"text":"Levels above 19.4 μg/dL may suggest Cushing's syndrome or other conditions causing excess cortisol production.","label":"High"}

Cortisol is a steroid hormone that plays a crucial role in the body's response to stress, metabolism, immune response, and maintaining blood pressure.

The measurement of cortisol in the morning is particularly important because cortisol levels naturally fluctuate throughout the day, with the highest levels typically occurring in the early morning.

Abnormal morning cortisol levels can indicate conditions such as Cushing's syndrome, Addison's disease, or other adrenal disorders.

Frequently asked questions

What is the normal range for morning cortisol levels?
The normal range for morning cortisol levels is typically 6.2–19.4 μg/dL.
How is a cortisol test performed?
A cortisol test usually involves a blood draw, often in the morning when levels are highest.
  1. 1
    Mayo Clinic: Cortisol TestSource
  2. 2
    Cleveland Clinic: CortisolSource

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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy