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Darker hair may lead to higher cortisol readings, suggesting a need to adjust for hair color in studies.

In this study, scalp hair sweating was a significant predictor of hair cortisol levels in healthy adults, while BMI and perceived stress, although associated, did not significantly predict cortisol levels.

This study suggests that measuring cortisol levels in hair may serve as a useful biomarker for assessing mood in individuals with bipolar disorder over recent months.

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.

In this animal study, finasteride was found to significantly lower cortisol and increase testosterone levels in female rats, indicating its broader impact on endocrine regulation by altering adrenal and gonadal hormones.

This study suggests that hair cortisol and cortisone may moderate the relationship between work stress and depressive symptoms in Chinese fishermen, although their mechanisms differ.

This study demonstrated that cortisol, estradiol, and testosterone are preserved in archaeological human hair, allowing for the analysis of ancient stress and reproductive hormone patterns.

This study suggests that gel containing OSF3 loaded in niosomes offers high transfollicular penetration for topical anti-androgenic alopecia treatment with minimal systemic effect.

This study found that testosterone concentrations in hair samples were moderately stable over three months, with cosmetic treatments like coloring increasing testosterone levels, while natural hair color in untreated hair did not affect testosterone measurements.

This study found no general elevation in androgen levels among men predisposed to balding, despite a correlation with the free-to-total testosterone ratio; no link was observed with acne.

This study developed a new method using liquid chromatography-tandem mass spectrometry to measure multiple steroid hormones in hair, requiring significantly fewer strands than previous methods, with high accuracy and precision.

This review covers the pathophysiology, diagnosis, and treatment of congenital adrenal hyperplasia due to 21-hydroxylase deficiency and reports no new findings.

This review discusses the potential of using human hair proteomics for non-invasive diagnostic and forensic applications but reports no new results; the authors highlight areas needing further research.

This article reviews postpartum hair loss management strategies, highlighting a lack of thoroughly investigated effective treatments and suggests that new research focus on targeted biological methods.

This article provides an overview of diagnosing Cushing's syndrome, emphasizing the importance of assessing clinical signs and the appropriate use of first-line biochemical screening.

This study found that stress plays a significant role in altering phenotypic features and body composition among PCOS patients, potentially worsening due to the COVID-19 pandemic.

This review discusses the complex relationship between stress and various skin conditions, highlighting the role of the skin in the stress response and the brain-skin communication pathways, but reports no new research findings.

This study found that men with androgenic alopecia had significantly higher levels of certain urinary steroid metabolites, suggesting increased 5 alpha-reductase activity and possible mild hyperadrenal activity.

This study developed a sensitive method using LC-ESI-MS/MS for accurate and reliable measurement of nine steroid hormones in children's serum.

This paper presents a culturally informed protocol designed to improve the collection of hair samples from African Americans for cortisol measurement, illustrating its application with community-based study data.

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.

This study found that experiencing childhood abuse is associated with higher BMI, but hair cortisol and cortisone do not mediate this relationship.

This study observed that testosterone concentrations in hair segments show some stability over time, but are influenced by factors like sebum integration, hair washing frequency, and individual hair growth rates.

In this study, researchers found that tritiated cortisol was incorporated into the hair of rhesus monkeys primarily as cortisol and cortisone, as well as other metabolites, after systemic administration.

This study explored 25-hydroxyvitamin D3 levels in hair samples from participants in Aberdeen and suggested potential links between hair vitamin D levels, seasonal UVB exposure, and marine diet in both modern and archaeological contexts.

This study reported that pulverizing hair samples significantly improves the precision of testosterone measurement, with higher testosterone concentrations observed in men than in women.

This study examined sheltered and adopted domestic cats, finding that dark coat color and living environment significantly influence hair cortisol and DHEA levels as stress indicators, while age and sex do not; adoption was associated with reduced long-term stress, underscoring its benefits for feline welfare.

This study reported that analyzing hair cortisol levels using a validated online SPE LC-MS method provided a way to assess long-term hormone secretion in 114 healthy volunteers, with a median hair cortisol value of 4.76 pg/mg.

The new method can measure sleep-related hormones in hair effectively and could help track long-term sleep patterns.