Morning Cortisol — Stress Axis Marker
Morning cortisol measures the adrenal stress hormone, drawn early because levels vary through the day. How to read your result against the lab's 8 a.m. range.
A morning cortisol test measures cortisol, the adrenal hormone that helps the body respond to stress; it is usually drawn early in the day because levels vary through the day, and MedlinePlus gives 5–25 µg/dL for an 8 a.m. sample (ranges vary by lab).
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Cortisol changes through the day, so the result only means something against the time it was drawn.
Transcript & sources → All videosMr. Age is AgeGen's editorial character. Facts come from the protocol above.
The biomarker
- Name: Morning Serum Cortisol
- Units: µg/dL
- Standard reference range: 5–25 µg/dL for a sample taken at 8 a.m. (ranges vary by lab)
How to read your result
| Value | Interpretation |
|---|---|
| Below the range | Has several possible causes; more tests are needed to find which. |
| Above the range | Has several possible causes. The most common cause of abnormal cortisol is taking steroid medicines for a long time or stopping them suddenly; stress and exercise can also raise cortisol. |
| Any out-of-range result | Does not always mean a condition that needs treatment — a cortisol test alone cannot diagnose the cause. |
What moves the needle
- Preparation. Rest before the test — stress and exercise can raise cortisol. Follow the draw time your provider gives.
- Medicines. Tell your provider about every medicine you use, including skin creams.
- Clinician. An abnormal result is usually followed by more tests; review it with a clinician.
Why this test is worth asking for
- Cortisol, made by the adrenal glands, helps the body respond to stress and regulate blood sugar and metabolism.
- Levels vary through the day, which is why the test is usually done early in the morning and read against a time-specific range.
- An out-of-range result is a starting point for further testing, not a diagnosis on its own.
Related protocols
Sources
- MedlinePlus — Cortisol test
- MedlinePlus Encyclopedia — Cortisol blood test
- MedlinePlus — Adrenal gland disorders
AgeGen lab guides are educational only. We do not provide medical diagnosis, prescribe brands, or recommend specific doses. Talk to a licensed clinician before changing your supplement or medication routine.
