January 2017 in “STARS (University of Central Florida)” This study found that steroid reproductive hormones such as estradiol and testosterone can be preserved and analyzed in archaeological human hair, providing new insights into ancient health and fertility.
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December 1998 in “The Journal of Steroid Biochemistry and Molecular Biology” This study found that steroid hormone levels in human hair correlate significantly with those in serum, suggesting hair may be a viable medium for assessing hormonal status.
February 2019 in “Psychoneuroendocrinology” This study suggests that measuring hair DHEA and testosterone can reliably reflect long-term average hormone levels in women, overcoming daily and menstrual fluctuations seen in salivary hormone assessments.
April 2023 in “Journal of Investigative Dermatology” This research developed new in vitro models for high-throughput screening of drugs that could protect or restore immune privilege in hair follicles, finding that Tofacitinib was effective in preventing inflammation-related marker upregulation, while Tacrolimus and αMSH worked specifically in outer root sheath keratinocytes.
September 2021 in “Journal of advances in medicine and medical research” This study indicated a correlation between female pattern hair loss and decreased serum levels of Vitamin D3, suggesting that Vitamin D3 evaluation may be important in managing this condition.