Definition
What Cortisol measures
Cortisol is the primary glucocorticoid from the adrenal cortex. A blood value is time-of-day dependent; morning and afternoon results are not interchangeable.
Illustrative sample band · Synthetic
14ug/dL
4.6Sample target 6–18 ug/dL24
Why it matters
How clinicians usually read it
It helps when fatigue, blood pressure, glucose, or recovery questions need an adrenal-axis data point. It is not a standalone “stress score.”
When it reads low
A lower value can mean
A low morning cortisol can be collection timing, recent steroid exposure, or a true adrenal-axis issue. That last possibility needs prompt clinical review.
When it reads high
A higher value can mean
A high value can follow a difficult draw, recent caffeine, illness, or a sustained cortisol excess. Time of day must be on the label before comparing results.
Questions for a clinician
Bring the number into a real conversation
01
What time was this drawn, and is it comparable to a prior result?
02
Could a recent steroid, illness, or a stressful draw explain it?
03
Do symptoms suggest we need a different adrenal test than a single blood value?
Educational boundary
Educational information only. Displayed ranges are illustrative sample bands, not a diagnosis, treatment plan, or substitute for the contracted laboratory report and a qualified clinician.
See it as a sample result
The sample dashboard shows an illustrative reading, target band, and trend for Cortisol.