489 citations
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June 2005 in “The FASEB Journal” Human hair follicles can produce cortisol like the body's stress response system.
August 2019 in “Journal of archaeological science: Reports/Journal of archaeological science: reports” Ancient hair can preserve hormones, revealing health and fertility insights.
January 2026 in “Universität Zürich, ZORA” August 2025 in “Journal of Affective Disorders” Gender-diverse people face more depression and anxiety, partly due to stress and lower cortisol levels.
July 2025 in “International Journal of Dermatology Venereology and Leprosy Sciences” Higher stress levels may worsen alopecia areata, suggesting stress management is important for treatment.
January 2026 in “Open Science Framework” 30 citations
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July 2023 in “Clinical Chemistry and Laboratory Medicine (CCLM)” Cortisone in hair is a more reliable indicator of stress hormone exposure than cortisol.
5 citations
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January 2021 in “PeerJ” Elephant tail-hair can show past stress levels, matching times when stressful events happened.
10 citations
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September 2019 in “Frontiers in Veterinary Science” Older steers have higher hair cortisol levels than younger steers.
May 2026 in “The Knowledge Bank (The Ohio State University)” Mare and foal hair cortisol levels are strongly linked, indicating potential for assessing fetal health and stress.
April 2026 in “Frontiers in Veterinary Science” Male cats have higher stress levels than females.
August 2015 in “Psychoneuroendocrinology” 1 citations
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January 1978 in “PubMed” Certain chemical changes to cortisol and progesterone can increase or decrease their ability to inhibit hair growth.
August 2016 in “Psychoneuroendocrinology” 1 citations
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October 2024 in “International Journal of Obesity” May 2026 in “Psychoneuroendocrinology” May 2026 in “Research Square” January 2026 in “Zenodo (CERN European Organization for Nuclear Research)” January 2026 in “Zenodo (CERN European Organization for Nuclear Research)” The study aims to see if maternal hair cortisol levels during pregnancy relate to adverse childhood experiences.
Cows moving from tie-stall to free-stall housing had more heel problems, less joint lesions, and higher stress levels.
August 2018 in “Psychological Science” May 2026 in “Microchemical Journal” January 2026 in “SSRN Electronic Journal”
May 2026 in “Preprints.org” Dark-coated cats are more stressed, and adoption reduces stress in cats.
4 citations
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December 1962 in “European journal of endocrinology” Alloxan diabetes, methylthiouracil, cortisone, and adrenaline affect how white mice hair follicles use glucose and cystine and their cell division.
30 citations
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November 2021 in “Obesity Reviews” Higher glucocorticoids in hair are linked to increased obesity measures like waist size.
1 citations
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November 2023 in “Frontiers in veterinary science” Goat hair shows changes in metal levels and stress when goats move from indoors to mountain pastures.
20 citations
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August 2005 in “Journal of Cutaneous Medicine and Surgery” Hair transplant for eyebrow alopecia areata provided significant relief and improved treatment response.
7 citations
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August 2005 in “Journal of Cutaneous Medicine and Surgery” Hair transplants can temporarily help with eyebrow hair loss.