Adrenocorticotropic Hormone (ACTH), Plasma Labcorp test 004440

This test measures the amount of adrenocorticotropic hormone (ACTH) in your blood, a chemical messenger made by the pituitary gland that signals your adrenal glands to produce cortisol. It helps identify the cause of symptoms related to too much or too little cortisol, such as severe fatigue, muscle weakness, or unexplained weight changes.