Definition
ACTH, short for adrenocorticotropic hormone, is a hormone produced by the pituitary gland. Its primary role is to stimulate the adrenal glands to release cortisol. Think of it as a messenger from the brain to the adrenal glands. Cortisol helps regulate stress, metabolism, and immune function. ACTH levels are carefully controlled by the body to maintain hormonal balance. It's essential for responding to stress and maintaining overall health.