August 2021 in “Asian Journal of Pharmaceutical and Clinical Research” Plant extracts in shampoo improved hair thickness and density in men with hair loss.
296 citations
,
October 2018 in “General and Comparative Endocrinology” Hair cortisol is a reliable way to measure long-term stress in animals.
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.
23 citations
,
August 2017 in “Scientific Reports” Darker hair may lead to higher cortisol readings, suggesting a need to adjust for hair color in studies.
21 citations
,
June 2016 in “Journal of Medical Primatology” Captive management practices affect hair loss and stress in rhesus monkeys, with differences between facilities.
16 citations
,
January 2021 in “Frontiers in veterinary science” Pigs in farrowing crates and loose-housing systems showed no difference in chronic stress levels as measured by hair cortisol.
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.
3 citations
,
June 2021 in “Journal of affective disorders” Hair cortisol and cortisone levels may affect how work stress influences depression in Chinese fishermen.
2 citations
,
June 2022 in “Scientific reports” Women with PCOS have higher hair cortisol levels, which are linked to worse metabolic and inflammatory conditions.
2 citations
,
December 2021 in “Scientific reports” Scalp hair sweating is a significant predictor of hair cortisol levels.
1 citations
,
July 2019 in “Psychoneuroendocrinology” 1 citations
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September 2016 in “Brain Behavior and Immunity” Hair cortisol levels can indicate stress and are affected by washing frequency, not cosmetic treatments.
Higher cortisol levels might be linked to worsening keratoconus.
March 2026 in “Journal of Pain” Preoperative stress markers alone don't predict chronic post-surgical pain.
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 “Psychoneuroendocrinology” Self-collected hair samples can measure stress but may need adjustments for accuracy.
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.
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.
April 2020 in “Journal of the Endocrine Society” Hair cortisol measurement can help diagnose and monitor Cushing’s disease.
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”