76 citations
,
October 2011 in “Clinica Chimica Acta” In this study, ultraviolet irradiation and immersion in shampoo and hot water significantly reduced hair cortisol, illustrating a two-stage process of cortisol loss that may impact chronic stress assessment.
80 citations
,
January 2011 in “Clinical Chemistry and Laboratory Medicine (CCLM)” This study confirmed that the diffusion of cortisol from blood is a biologically endogenous source of hair cortisol, correlating significantly with salivary cortisol levels in healthy humans.
217 citations
,
July 2009 in “Experimental and Clinical Endocrinology & Diabetes” This study found that hair cortisol levels were significantly higher in patients with Cushing's Syndrome compared to healthy controls, suggesting hair analysis can provide historical information on cortisol exposure.
501 citations
,
October 2008 in “Psychoneuroendocrinology” This study suggests that cortisol measured in human hair can effectively reflect increased production for up to six months, but its retrospective accuracy may be limited due to rapid decline in levels.
567 citations
,
October 2007 in “Clinical and investigative medicine” This study described a new assay for measuring cortisol in hair and found it may serve as a useful biomarker for long-term cortisol exposure, correlating with 24-hour urine cortisol levels in non-obese subjects.
199 citations
,
July 2007 in “General and Comparative Endocrinology” In this study, researchers found a significant positive association between cortisol levels in hair and feces of domestic cats and dogs, suggesting hair cortisol assays could be a viable option for monitoring chronic stress.
25 citations
,
February 2007 in “Forensic science international” This study found that different decontamination protocols caused varying levels of cuticle damage in hair, with aqueous buffer treatment resulting in the most substantial degradation.
489 citations
,
June 2005 in “The FASEB Journal” This study found that human scalp hair follicles can respond to corticotropin releasing hormone stimulation similarly to the classical HPA axis, including up-regulating cortisol production and activating neuroendocrine feedback loops.