122 citations
,
October 2010 in “Clinica Chimica Acta” In this study, washing rhesus monkey hair with water or shampoo significantly reduced cortisol levels, suggesting potential underestimation of chronic stress hormone deposition in hair due to washing.
22 citations
,
January 2010 in “Clinical Medicine Insights Endocrinology and Diabetes” In this study, hair from forearms showed higher cortisol levels than hair from lower legs, suggesting a localized cortisol response in hair.
90 citations
,
July 2014 in “Conservation Physiology” This study found that hair cortisol concentration in free-ranging brown bears is influenced by handling methods, body condition, and potentially both short- and long-term stressors.
50 citations
,
November 2020 in “Physiology & behavior” This review found that patients with depression generally have higher hair cortisol concentrations compared to healthy controls, while those with PTSD tend to have lower concentrations.
33 citations
,
January 2017 in “Psychoneuroendocrinology” This study of Danish women found no evidence linking hair cortisol concentration to hair dyeing status or the frequency of hair washing.