August 2021 in “Asian Journal of Pharmaceutical and Clinical Research” Plant extracts in shampoo improved hair thickness and density in men with hair loss.
157 citations
,
June 2015 in “Psychoneuroendocrinology” Hair cortisol and cortisone levels increase with age, are higher in diabetics, vary by gender, decrease with frequent hair washing, and are lower in winter.
118 citations
,
October 2014 in “Journal of Dairy Science” Tail switch hair is best for measuring cortisol in Holstein cows, with white hair and multiparous cows showing higher levels.
51 citations
,
November 2005 in “Journal of Medical Primatology” Alopecia in captive rhesus macaques is affected by season, sex, age, housing, and stress, with complex links between stress hormones and hair loss.
38 citations
,
September 2013 in “Therapeutic Drug Monitoring” First Nation individuals had higher hair cortisol levels, indicating more chronic stress.
21 citations
,
January 2017 in “MethodsX” Methanol is better than isopropanol for washing grizzly bear hair to measure cortisol.
21 citations
,
June 2016 in “Journal of Medical Primatology” Captive management practices affect hair loss and stress in rhesus monkeys, with differences between facilities.
11 citations
,
April 2020 in “Animals” Moving horses to new places can increase their stress levels, as shown by higher stress hormone in their hair.
11 citations
,
February 2005 in “Clinical pharmacology and therapeutics/Clinical pharmacology & therapeutics” Hair cortisol could be a marker for chronic stress in pregnancy, but depression affects cortisol levels differently.
1 citations
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July 2019 in “Psychoneuroendocrinology”
Higher cortisol levels might be linked to worsening keratoconus.
February 2026 in “Psychoneuroendocrinology” Lower family income is linked to more stress in parents and more behavior problems in children.
Gender-diverse individuals face more depression and anxiety, possibly due to unique stress profiles.
January 2026 in “Phaidra - Repository of the University of Veterinary Medicine, Vienna” Hair cortisol levels in wolves reflect stress and vary by season and body region.
January 2026 in “Psychoneuroendocrinology” Loneliness raises stress levels in older African American men but not women.
July 2024 in “Nursing Research” Hair and nail cortisol levels can show long-term stress in young males.
February 2024 in “Psychoneuroendocrinology” Higher anxiety during pregnancy is linked to lower cortisol levels in newborns' hair.
February 2024 in “Psychoneuroendocrinology” Higher prenatal anxiety is linked to lower cortisol levels in newborns' hair.
February 2024 in “Psychoneuroendocrinology” Mothers with lower stress during pregnancy but higher stress after birth had infants with lower development scores.
November 2022 in “Innovation in aging” Older adults in Puerto Rico often couldn't be tested for hair cortisol due to refusal or lack of hair, with race and hair products affecting results.
September 2021 in “Psychoneuroendocrinology” Nurses had higher stress levels during intense phases of the COVID-19 pandemic.
February 2020 in “VSNU Open Access deal” Hair cortisol levels change with age, starting high at birth, decreasing until age 6, then rising to adult levels by age 18.
December 2019 in “Case Medical Research” January 2018 in “Belarusian State Pedagogical University repository (Belarusian State Pedagogical University)” Stress might trigger hair loss in alopecia areata, but more research is needed.
July 2011 in “Neurotoxicology and Teratology” April 2026 in “Frontiers in Veterinary Science” Male cats have higher stress levels than females.
January 2026 in “Universität Zürich, ZORA” Wage increases and cash benefits reduced stress in early childhood educators.
August 2015 in “Psychoneuroendocrinology” 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.