Hair cortisol content can indicate cortisol exposure and varies with age, puberty, and BMI in youth.
December 2025 in “Therapeutic Drug Monitoring” Pulverization extracts more cortisol from hair, but any method works due to individual differences.
High-stress mothers had lower hair cortisol than low-stress mothers, and daughters' cortisol was linked to their stress response.
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.
30 citations
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July 2016 in “Psychoneuroendocrinology” 3 citations
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January 2012 Hair cortisol analysis shows sweat affects cortisol levels, and severe OSA may increase stress, but CPAP treatment doesn't significantly reduce physiological stress.
21 citations
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January 2016 in “NeuroImmunoModulation” Hair cortisol levels can indicate stress over the past three months.
Measuring cortisol in hair can help assess adrenal function in asthmatic children using inhaled corticosteroids.
February 2017 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Hair cortisol measurement is a promising, non-invasive tool for monitoring cortisol exposure over time.
September 2024 in “Toxicology Letters” Cortisone and cortisol levels in pregnant women’s hair increase as labor approaches, indicating higher stress.
May 2026 in “Microchemical Journal”
11 citations
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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.
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.
April 2026 in “Comprehensive Psychoneuroendocrinology” Hair cortisol levels may be linked to stress, but results are inconsistent.
January 1999 in “Salina: revista de lletres” Ashwagandha may help reduce symptoms of adrenal hyperplasia.
5 citations
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June 2020 in “Therapeutic drug monitoring” Hair sample weight is a better measure for cortisol levels in hair than hair protein concentration.
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.
2 citations
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January 2009 The procedure reliably measures cortisol in rhesus macaque hair.
217 citations
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July 2009 in “Experimental and Clinical Endocrinology & Diabetes” Hair analysis can track past cortisol levels in Cushing's Syndrome patients.
1 citations
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June 2024 in “Rehabilitation Medicine” Higher cortisol and cortisone levels in hair may predict mood disorders after a stroke.
85 citations
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January 2014 in “Hormone Research in Paediatrics” Hair cortisol levels in children increase with age but are not affected by gender, puberty, or hair care.
November 2025 in “Contraception” COC use doesn't increase hair stress hormone levels, but hair treatments may affect results.
April 2026 in “Journal of Experimental Psychopathology” Hair cortisol levels may not reliably indicate psychological distress.
November 2025 in “Anxiety Stress & Coping” Higher anxiety symptoms and social behavior affect stress levels in hair.
5 citations
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May 2021 in “Veterinary medicine and science” Injecting cosyntropin into grizzly bears increases blood cortisol but doesn't change hair cortisol levels.
3 citations
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October 2021 in “Clinica Chimica Acta” Hormone levels in hair vary across the head, with the highest concentration of a key hormone linked to hair loss at the top.
April 2026 in “Frontiers in Veterinary Science” Male cats have higher stress levels than females.
4 citations
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June 2025 in “JMIR Formative Research” Hair cortisol concentration may reflect some physiological stress but doesn't strongly correlate with perceived stress.
47 citations
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January 2016 in “MethodsX” Hair cortisol analysis is a reliable tool for monitoring long-term stress in captive chimpanzees if certain variables are controlled.