Hair cortisol content can indicate cortisol exposure and varies with age, puberty, and BMI in youth.
12 citations
,
January 1999 in “Journal of Animal Science” Glucocorticoids and thyroid hormones together are essential for fetal fat development.
30 citations
,
July 2023 in “Clinical Chemistry and Laboratory Medicine (CCLM)” Cortisone in hair is a more reliable indicator of stress hormone exposure than cortisol.
January 1983 in “Journal of the Japan Veterinary Medical Association” Daily treatment eventually improved the dog's symptoms.
51 citations
,
July 2013 in “Brain Research” Testosterone needs to be converted to DHT to reduce stress response in male rats.
189 citations
,
January 2014 in “Journal of Visualized Experiments” Hair cortisol analysis effectively measures long-term stress.
2 citations
,
July 2021 in “Journal of feline medicine and surgery open reports” A diabetic cat with another gland issue got better after treatment with cabergoline, no longer needing insulin.
217 citations
,
July 2009 in “Experimental and Clinical Endocrinology & Diabetes” Hair analysis can track past cortisol levels in Cushing's Syndrome patients.
9 citations
,
December 1958 in “Journal of Investigative Dermatology”
1 citations
,
October 2022 in “International journal of endocrinology” Dihydrotestosterone changes some hormone-related gene expressions in rat pituitary glands but doesn't affect the estrous cycle.
1 citations
,
June 2024 in “Rehabilitation Medicine” Higher cortisol and cortisone levels in hair may predict mood disorders after a stroke.
7 citations
,
January 2014 in “Case reports in endocrinology” A woman's excessive hair growth was caused by a rare benign tumor in her adrenal gland, which was successfully removed.
August 2016 in “Psychoneuroendocrinology”
October 2024 in “Journal of the Endocrine Society” ACTH-dependent Cushing's syndrome linked to metastatic cervical cancer is rare and has high risks.
5 citations
,
October 2021 in “Signal Transduction and Targeted Therapy” Stress hormone corticosterone suppresses hair growth by affecting stem cell activity and Gas6 protein expression.
October 2012 in “Semina. Ciências Agrárias” A Shi Tzu dog with high cortisol levels improved after increasing the dose of trilostane.
4 citations
,
December 2022 in “The journal of investigative dermatology/Journal of investigative dermatology” Human scalp hair follicles can produce hormones and have a system similar to a brain-body communication network.
October 2025 in “Medicine” A potential link exists between unexplained hormone deficiency, hair loss, and testicular tumors, suggesting thorough screening is needed.
77 citations
,
March 2021 in “Nature” Stress hormone corticosterone blocks a growth factor to slow down hair stem cell activity and hair growth.
Hair cortisol levels can effectively indicate long-term hormone activity.
A woman's Cushing's syndrome caused by adrenal cancer improved after surgery.
January 2025 in “JCEM Case Reports” Ketoconazole improved symptoms of ACTH-independent Cushing syndrome despite inconclusive initial scans.
2 citations
,
January 2009 The procedure reliably measures cortisol in rhesus macaque hair.
December 2025 in “Biology Bulletin Reviews” Hair cortisol can indicate animal stress but varies with many factors.
199 citations
,
July 2007 in “General and Comparative Endocrinology” Hair cortisol can reliably indicate chronic stress in cats and dogs.
95 citations
,
September 1979 in “Acta Paediatrica” Girls have higher DHEA levels earlier in puberty than boys, indicating earlier development.
May 2016 in “Endocrine Abstracts” Proximal hair cortisol is a reliable tool for diagnosing Cushing's Syndrome.
22 citations
,
August 2016 in “European Eating Disorders Review” Adolescent girls with anorexia nervosa have lower hair cortisol levels than healthy and psychiatric peers.
6 citations
,
February 2017 in “Case Reports in Dermatology” Hair loss led to the diagnosis of Cushing's disease in a patient, showing that hair loss can be a sign of hormonal disorders.
22 citations
,
May 2019 in “Animals” High hair cortisol levels indicate stress in cows due to poor shelter conditions and health issues.