What do your cortisol levels mean?
The short answer
The doctors we follow don't watch cortisol. So there's no target here — they looked and moved on.
“There's no optimal exact level. There's no optimal level for one exact time.”
Your lab prints 6.2–19.4 µg/dL. That range exists to catch disease, not to describe your best.
What cortisol measures
Your main stress hormone. Your adrenal glands make it.
It follows a daily rhythm, high in the morning and low at night. So the time of the draw matters as much as the value.
Checked against MedlinePlus — Cortisol Test.
Common questions
What is a normal cortisol level?
Most US labs print 6.2–19.4 µg/dL. Your report grades you against that range. It exists to catch disease, not to describe your best.
What does your cortisol number mean?
Under 6.2 µg/dL, your report marks it low. Between 6.2 and 19.4 it prints as normal. Over 19.4, your report marks it high. Nobody we follow has drawn a line inside that range.
What does the cortisol test measure?
Your main stress hormone. Your adrenal glands make it. It follows a daily rhythm, high in the morning and low at night. So the time of the draw matters as much as the value.
Why is there no target here?
Because Andrew Huberman argues cortisol isn't the number to watch. The clip above is that moment.