January 2026 in “Open Science Framework” This study examines various methodological factors affecting hair cortisol concentration analysis, finding inconsistent results on the impact of factors like resuspension solution, hair weight, extraction duration, and hair-cutting method.
101 citations
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January 2014 in “Journal of Visualized Experiments” This study validated a method for measuring cortisol levels in hair, which may serve as a biomarker for chronic stress in both humans and various animals.
189 citations
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January 2014 in “Journal of Visualized Experiments” This study developed and validated a method for extracting cortisol from human and animal hair, suggesting its potential as a biomarker for assessing chronic stress exposure.
44 citations
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February 2016 in “Zoology” This study observed that hair cortisol concentrations in primates are influenced by factors such as age, sex, hair growth rates, and sampling methods, which must be accounted for in research designs.
4 citations
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February 2019 in “American Journal of Human Biology” This study suggests that collecting hair samples from all scalp regions may be a viable alternative for measuring cortisol in individuals with Afro-textured or extremely short hair, aligning results with traditional methods.