Morning Cortisol: what is a good level?
Morning cortisol reference intervals vary by laboratory, method and collection time. A result should be interpreted for the clinical question for which it was ordered.
This input does not contribute to the Longevity Score while its use is under clinical review. Discuss its interpretation with your clinician.
What Morning Cortisol actually measures
Cortisol is a hormone regulated by the hypothalamic-pituitary-adrenal (HPA) axis. It generally varies over the day, with higher levels around waking and lower levels at night, so the time of collection matters.
A single morning serum result cannot establish someone's chronic stress level or diagnose adrenal disease on its own.
Why it matters
Cortisol testing can be useful for specific clinical questions, but is not a general-purpose test of chronic stress.
A clinician may consider collection time, symptoms, medicines and additional testing when interpreting an unexpected result.
Why it's on the dashboard
Morning cortisol remains available as a context-only input. It does not contribute to the Longevity Score. See the Hormonal dial for the broader context.
Interpreting this result
The calculator no longer assigns an optimal morning cortisol range or scores this result while its role is under clinical review.
The reference interval on the report and the reason for ordering the test are important; discuss them with the ordering clinician.
This distinction applies across the whole panel, not just this marker — see optimal versus standard lab ranges for the general case.
What moves Morning Cortisol
Educational information, not a treatment plan. Discuss changes to medication or supplementation with a clinician who knows your history.
How fast it responds
Cortisol changes throughout the day. Follow the clinician's and laboratory's instructions for timing and any repeat testing. See response times across all markers for how this compares.
What can distort the result
- Confirm collection time with your clinician and laboratory, particularly if your sleep schedule differs from the usual schedule.
- Acute illness, recent significant stress, poor sleep the prior night and even the stress of the blood draw itself can all transiently raise a single reading — one value is a data point, not a diagnosis.
- Oral oestrogen (including some hormonal contraceptives) raises the binding protein that carries cortisol in blood and inflates total cortisol readings without necessarily reflecting more free, active hormone.
- An unexpected result or concerning symptoms warrant clinical evaluation; do not self-treat based on a single result.
Frequently asked questions
Does Morning Cortisol affect my Longevity Score?
No. This input is shown for context and does not contribute to the score while its use is under clinical review.
How should I interpret a Morning Cortisol result?
Morning cortisol reference intervals vary by laboratory, method and collection time. A result should be interpreted for the clinical question for which it was ordered.
How fast does Morning Cortisol respond to change?
Cortisol changes throughout the day. Follow the clinician's and laboratory's instructions for timing and any repeat testing.
Related markers
Morning Cortisol is context only and does not affect the score; explore the hormonal dial, and read it alongside TSH · HRV.
Sources and further reading
These sources provide general context; calculator scoring ranges are not clinical treatment targets.