The ACTH Test measures the level of Adrenocorticotropic Hormone in your blood. ACTH is a crucial hormone produced by the pituitary gland (located at the base of the brain). Its primary function is to stimulate the adrenal glands (located on top of the kidneys) to produce the stress hormone cortisol.
The ACTH test is essential for diagnosing disorders related to the production of cortisol, specifically diseases that affect the pituitary and adrenal glands. This is often referred to as assessing the Hypothalamic-Pituitary-Adrenal (HPA) axis.