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The authors propose that higher testosterone levels in hospitalized COVID-19 patients might be associated with worse outcomes.

This study found a weak negative correlation between inhaled corticosteroid dose and hair cortisol levels in children with asthma, suggesting that hair cortisol measurement may reflect adrenal function in these children.

This study determined that the genome size of Eclipta alba is 4.27 billion base pairs and Aloe barbadensis is 4.42 billion base pairs, providing data for potential future research.

A new mutation in the HR gene causes hair loss in a specific family.

This case study reports a new LAMB3 mutation linked to junctional epidermolysis bullosa with severe urinary tract stenosis, outlining treatment challenges and expanding knowledge of EB-related urological complications.

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.

This study found that hair cortisol concentrations can be reliably measured in healthy children and generally increase with age, unaffected by gender, puberty, or hair care practices.

This study found that nafarelin treatment significantly reduced androgen levels and improved hirsutism symptoms in women, suggesting it may be useful for managing this condition.

This study found that while a transscrotal testosterone patch increases serum testosterone levels in hypogonadal men with AIDS and weight loss, it does not improve weight, body cell mass, or quality of life.

Method detects finasteride in plasma and semen with high sensitivity and accuracy.

This study suggests that IL-1β produced by dermal papilla cells, regulated by protein kinase C, may inhibit human hair follicle growth through paracrine signaling.

This study found that IL-1 alpha inhibits the growth of cultured human hair follicles and hair fibers, suggesting a potential role in inflammatory hair loss conditions like alopecia areata.

In this case report, a transgender woman experienced scalp hair regrowth after approximately six months of oral estradiol and spironolactone treatment, achieving testosterone levels within the normal female range.

This study found that a 5-mg daily dose of transdermal testosterone cream in postmenopausal women restored testosterone levels to those typical of premenopausal women.

In this study, 7-phloroeckol, derived from marine brown algae, was found to promote hair growth by increasing cell proliferation and hair shaft elongation in cultured human hair follicles.

This study found no significant difference in hair cortisol concentrations, a chronic stress indicator, between sows in farrowing crates and those in loose-housing systems.

This study found that serum PSA levels are higher in hirsute women and can be significantly reduced by antiandrogen treatment, suggesting PSA as a marker of androgen action in females.

This study developed and validated a sensitive HPLC–MS/MS method for detecting seven prohibited substances in cosmetic products.

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 developed a model showing that keratin elasticity in skin may be influenced by electrostatic and bridging interactions between keratin filaments, contingent on the balance of charges in the surrounding medium.

This study shows that measuring 17-hydroxyprogesterone concentrations in scalp hair may be a useful noninvasive tool for monitoring treatment in adults with congenital adrenal hyperplasia.

This source reports that tofacitinib and ruxolitinib showed potential efficacy and acceptable safety profiles in treating various autoimmune disorders, including alopecia areata and psoriasis, based on a review of clinical studies, while recommending physicians consider the individual risks and benefits.

This study observed that ethyl glucuronide (EtG) concentrations in hair decreased significantly during an abstinent period, suggesting possible wash-out effects or other factors affecting EtG levels.

This study demonstrated that an LC/MS-MS method could effectively detect and quantify the vitamin B3 vitamer nicotinamide in human hair, suggesting its potential use for long-term deficiency examination.

This case report describes a testosterone- and cortisol-secreting adrenocortical oncocytoma causing hirsutism in a 23-year-old woman, highlighting adrenal oncocytomas as an important consideration for differential diagnosis.

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

This study suggests that analyzing hair samples with a liquid chromatography-mass spectrometric assay may offer a reliable method to measure average quarterly vitamin D levels, potentially complementing blood tests.

This case report describes a 47-year-old male with rare total melanonychia linked to vitamin B12 deficiency, whose nail discoloration and constitutional symptoms improved following vitamin B12 supplementation.

This case study describes a rare instance of a Granulosa‐Theca cell tumor causing sexual precocity in a 12-month-old infant, with significantly reduced estradiol levels following tumor removal.

In this study, patients with alopecia areata showed significantly elevated serum levels of IFN-γ and severely deficient vitamin D3 levels compared to healthy controls.