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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.
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June 2023 in “Psychoneuroendocrinology” Childhood sexual trauma, especially between ages 5-7, is linked to lower cortisol levels in adult hair, suggesting long-term stress response changes.
June 2026 in “Psychoneuroendocrinology” Higher cortisol levels and stress are linked to worse cognition and more fatigue in MS patients.
April 2026 in “Al-Kufa University Journal for Biology” Finasteride lowers cortisol and raises testosterone levels in rats.
February 2026 in “TURKISH JOURNAL OF VETERINARY AND ANIMAL SCIENCES” Hair cortisol is better than blood cortisol for measuring long-term stress in pregnant goats.
January 2026 in “Psychoneuroendocrinology” Lye relaxers don't significantly change hair cortisol levels.
January 2026 in “Neuroscience Applied” Hair cortisol levels decrease as children age, stabilizing around age 4.
December 2025 in “Therapeutic Drug Monitoring” Pulverization extracts more cortisol from hair, but any method works due to individual differences.
November 2025 in “Anxiety Stress & Coping” Higher anxiety symptoms and social behavior affect stress levels in hair.
November 2025 in “Contraception” COC use doesn't increase hair stress hormone levels, but hair treatments may affect results.
November 2025 in “Journal of Laboratory Medicine” Chronic stress increased after lockdown, especially in young adults and females.
October 2025 in “Journal of Veterinary Diagnostic Investigation” Black hair in cats has higher cortisol levels than white hair.
April 2025 in “Medical Journal of Babylon” Copeptin and cortisol levels are higher in alopecia areata patients, suggesting they could help diagnose and manage the condition.
April 2025 in “Journal of the Faculty of Medicine Baghdad” Alopecia areata patients may have higher T3 and cortisol levels, suggesting a hormonal link.
February 2025 in “Iraqi Journal of Science” PCOS patients have higher LDH and lower cortisol, dopamine, zinc, and vitamin D3, which may contribute to their symptoms and obesity.
Hair hormone levels can indicate stress after a medically indicated abortion.
Higher pre-pregnancy BMI is linked to more stress in mothers and more behavioral problems in two-year-old children.
September 2024 in “Toxicology Letters” Cortisone and cortisol levels in pregnant women’s hair increase as labor approaches, indicating higher stress.
June 2023 in “Clinical Chemistry” Unregulated supplements can contain hidden drugs causing misleading symptoms and test results.
May 2023 in “General and comparative endocrinology” Monkey hair cortisol levels are not affected by how fast their hair grows.
February 2023 in “Journal of medical primatology” Pair housing reduces stress behaviors and health issues in quarantined rhesus macaques.
June 2020 in “Authorea (Authorea)” First-time mothers had higher stress hormone levels in late pregnancy than mothers who had given birth before.
Hair cortisol content can indicate cortisol exposure and varies with age, puberty, and BMI in youth.
Measuring cortisol in hair can help assess adrenal function in asthmatic children using inhaled corticosteroids.
January 2018 in “Digital Scholarship - UNLV (University of Nevada Reno)” Hair cortisol levels can indicate chronic stress in children, with differences seen between races.
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.
May 2016 in “Endocrine Abstracts” Proximal hair cortisol is a reliable tool for diagnosing Cushing's Syndrome.
High-stress mothers had lower hair cortisol than low-stress mothers, and daughters' cortisol was linked to their stress response.
May 2012 in “Neurotoxicology and Teratology” Hair cortisol can be a reliable way to measure long-term stress.
January 2012 in “CINECA IRIS Institutial Research Information System (University of Genoa)” Hair cortisol reliably indicates stress in rabbits.