A cortisol level test uses a blood sample to measure the level of cortisol in your blood. Cortisol is a steroid hormone released by the adrenal glands. The adrenal glands sit on top of your kidneys. A ...
A baseline ACTH level measured on the same blood sample as your cortisol level can assess your cortisol production. An ACTH stimulation test measures the ability of your adrenal glands to respond to ...