Cortisol – Cortisol is your primary stress hormone, made by the adrenal glands. It follows a daily rhythm, peaking in the morning.
What Cortisol measures
Cortisol measures cortisol levels at a point in time – useful for assessing stress response and adrenal function.
Typical ranges
Values depend heavily on the time of day and sample type. Morning blood cortisol is typically highest; labs provide time-specific ranges. Reference ranges differ between laboratories and by age and sex, so always read your result against the range printed on your own report.
What high results can mean
Can reflect stress, certain medications, or adrenal/pituitary conditions.
What low results can mean
Can reflect adrenal insufficiency and warrants clinical evaluation.
How the test is done
Blood or saliva, timed carefully (often early morning, sometimes multiple points across the day). At-home collection works well for this marker when the sample is processed by a certified lab.
FAQ
What is a normal Cortisol level?
Values depend heavily on the time of day and sample type. Morning blood cortisol is typically highest; labs provide time-specific ranges. Your ideal target depends on your age, sex, and health history, so review results with a clinician.
What does a high Cortisol result mean?
Can reflect stress, certain medications, or adrenal/pituitary conditions.
Can I test Cortisol at home?
Yes. Blood or saliva, timed carefully (often early morning, sometimes multiple points across the day). An at-home sample processed by a certified lab gives reliable results.
This article is educational and not a substitute for medical advice. Discuss your results with a qualified clinician.