Hormones
Cortisol
A stress-related hormone made by the adrenal glands.
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About this biomarker
Cortisol helps regulate stress response, metabolism, blood pressure, and immune activity. Levels change through the day, so timing matters.
Why it matters
It can add context in adrenal and endocrine evaluation.
What lower levels may suggest
Low cortisol may suggest reduced adrenal output or impaired signaling in the adrenal axis.
What higher levels may suggest
High cortisol may be seen with stress, steroid exposure, or disorders of cortisol excess.
Common tests
Morning serum cortisol, salivary cortisol, urinary free cortisol, adrenal panels
Related biomarkers
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