
08/27/2025
🌟 Understanding Adrenal Insufficiency 🌟
Did you know there are actually three types of adrenal insufficiency? Knowing the difference helps patients, families, and even doctors provide the best care. Here’s a quick breakdown:
🔹 Primary AI (Addison’s Disease):
The adrenal glands themselves are damaged and can’t make enough cortisol (and often aldosterone). This is the most well-known form though not the most common.
🔹 Secondary AI:
The adrenal glands are healthy, but the pituitary gland (in the brain) doesn’t send enough ACTH — the signal that tells the adrenals to release cortisol.
🔹 Tertiary AI:
This happens when the hypothalamus (another part of the brain) doesn’t make enough CRH to signal the pituitary. It often develops after long-term steroid use that suppresses the brain–adrenal communication.
👉 While the cause is different, all types mean the body can’t make enough cortisol — a hormone that’s essential for life.
💙 No matter the type, people living with adrenal insufficiency need awareness, support, and emergency planning. That’s why AIU is here.
Information in this graphic compiled by AIU using sources from the Lancet 2014 “Adrenal Insufficiency”: Evangelia Charmandari, Nicolas C Nicolaides, George P Chrousos. Additional resources from NIH and Mayo Clinic were also used. Reviewed and edited by Dr. Mitchell Geffner.
https://aiunited.org/information-adrenal-insufficiency/