September 2017 in “Springer eBooks” Certain supplements, like whey protein isolate and growth hormones, can worsen hair loss.
501 citations
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October 2008 in “Psychoneuroendocrinology” Hair cortisol levels can show increased stress during late pregnancy but only for up to six months.
237 citations
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September 2018 in “Clinical Biochemistry” Hair cortisol analysis can help diagnose stress-related conditions but needs more refinement for widespread use.
50 citations
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July 2018 in “Psychoneuroendocrinology” Hair cortisol can indicate long-term stress levels, but hair growth rate differences may affect accuracy.
33 citations
,
January 2017 in “Psychoneuroendocrinology” Hair dyeing and washing frequency do not affect hair cortisol levels.
22 citations
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January 2010 in “Clinical Medicine Insights Endocrinology and Diabetes” Forearm hair has more cortisol than lower leg hair.
21 citations
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January 2020 in “Conservation Physiology” Hair follicles increase hair cortisol levels, so consistent hair collection methods are important.
19 citations
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June 2020 in “General and comparative endocrinology” Hair cortisol is a reliable stress indicator in cattle but may not be valid for pigs.
17 citations
,
December 1951 in “Experimental biology and medicine” Vitamin B12 and aureomycin can reverse or reduce cortisone's negative effects on body and hair growth in rats.
16 citations
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March 2013 in “Clinica Chimica Acta” Cortisol and cortisone release from hair increases in steps over time during incubation.
16 citations
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August 2007 in “Histopathology” A woman's rare adrenal tumor caused high testosterone and cortisol levels, which normalized after the tumor was removed.
12 citations
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October 1952 in “Experimental biology and medicine” Vitamin B12 and aureomycin reduce the negative effects of high doses of cortisone in rats.
12 citations
,
December 1951 in “Experimental Biology and Medicine” Liver in the diet reduces cortisone acetate toxicity effects in rats.
11 citations
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May 2020 in “Frontiers in psychiatry” Child abuse is linked to higher BMI, but not because of hair cortisol or cortisone levels.
9 citations
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February 2020 in “Stress” Children with lower inhibitory control experience more stress when starting third grade.
7 citations
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September 2025 in “Psychoneuroendocrinology” Hair analytes decrease with storage, so analyze within six months.
2 citations
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June 2021 in “Medicine” High levels of cortisol in hair are linked to a greater risk of brain aneurysm rupture.
July 2026 in “Psychoneuroendocrinology” Hair cortisol and cortisone levels can indicate specific psychosocial stress factors.
November 2025 in “Contraception” COC use doesn't increase hair stress hormone levels, but hair treatments may affect results.
September 2024 in “Journal of Cosmetic Dermatology” Ectoin helps prevent cortisone-induced skin problems and supports skin health.
September 2024 in “Toxicology Letters” Cortisone and cortisol levels in pregnant women’s hair increase as labor approaches, indicating higher stress.
January 2024 in “Case Reports in Endocrinology” Cortisone tapering may help improve severe myasthenia gravis and alopecia areata after thymectomy.
January 2026 in “Open Science Framework” Standardized procedures are needed for accurate hair cortisol analysis.
December 2025 in “Biology Bulletin Reviews” Hair cortisol can indicate animal stress but varies with many factors.
November 2025 in “Journal of Laboratory Medicine” Chronic stress increased after lockdown, especially in young adults and females.
May 2021 in “Journal of the Endocrine Society” A patient produced cortisol after adrenalectomy, possibly due to residual tissue or other body parts making steroids.
June 2020 in “Authorea (Authorea)” First-time mothers had higher stress hormone levels in late pregnancy than mothers who had given birth before.
August 2019 in “Journal of archaeological science: Reports/Journal of archaeological science: reports” Ancient hair can preserve hormones, revealing health and fertility insights.
May 2016 in “Endocrine Abstracts” Proximal hair cortisol is a reliable tool for diagnosing Cushing's Syndrome.
567 citations
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October 2007 in “Clinical and investigative medicine” Hair cortisol can be used to measure long-term stress exposure.