Cortisol

Cortisol, timed against your own waking hour rather than the clock. An afternoon sample is not worth paying for.

Cortisol in the Biomarker Guide — what it is, why it is tested, and what moves the number.

Add-on markers can only be added to venous samples.

Timing

Collect one to three hours after you wake. Cortisol is timed against your waking hour, not the clock. No fasting needed, and a long fast can push cortisol up.

Turnaround: the lab reports this test within 24 hours of receiving your sample, counted in working days. Most samples reach them within about 3 days of posting. Full detail on our Turnaround Times page.

We do not interpret results. Not medical advice or a diagnosis.