"Adrenal fatigue" & cortisol myths
Also known as:
Adrenal fatigue, cortisol testing, adrenal support supplements
Adrenal fatigue is not a recognized diagnosis. Here's what's really behind the exhaustion.
Written and reviewed by Farhan Tahir, MD · Last reviewed
VIDEO LESSON
The claim
Adrenal fatigue is the idea that chronic stress wears out the adrenal glands, causing tiredness, brain fog and cravings, and that saliva cortisol panels can detect it.
What the evidence shows
Systematic reviews have found no evidence that adrenal fatigue exists as a medical condition. The Endocrine Society does not recognize it. Saliva cortisol panels sold for it are not validated for this use.
Real adrenal disease
Adrenal insufficiency, including Addison's disease, is real and serious. It is diagnosed with a morning cortisol and ACTH stimulation testing, and it is treated with replacement hormones.
Why it matters
• "Adrenal support" supplements have been found to contain undeclared thyroid and steroid hormones
• A label of adrenal fatigue can delay the real diagnosis: sleep apnea, depression, anemia, thyroid disease or perimenopause
Key studies and references
Educational content only, written and reviewed by Farhan Tahir, MD. It does not replace individual medical advice. For sudden chest pain, trouble breathing or stroke symptoms, call 911.
AT A GLANCE
Category
Heart & myth-busting
Also known as
Adrenal fatigue, cortisol testing, adrenal support supplements
Reviewed by
Farhan Tahir, MD
Questions about your own care?
Dr. Tahir’s team offers consults through Youthful Medicine.
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