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This study found that variations in sleep patterns, free testosterone, and 5-alpha-reductase type 1 activity are associated with changes in sebum excretion in women, which may contribute to variability in acne studies.

This study found that a testosterone patch and gel showed bioequivalent testosterone levels in hypogonadal men, but the patch mimicked a natural circadian profile, while the gel resulted in higher dihydrotestosterone levels.

Minoxidil, a common hair loss treatment, might work by counteracting a hormone that reduces hair growth and promotes hair loss.

This review provides a comprehensive overview of melatonin's physiological roles, effects, and clinical implications, but it does not present new experimental findings.

This review synthesizes recent findings on the hair follicle stem cell niche and its complex interactions, exploring potential pathways for developing new hair growth therapies; it reports no new clinical results.

This review discusses the presence of the StAR protein in 17 non-classical steroidogenic tissues, suggesting that advanced detection methods are needed for a complete understanding of its functions in these tissues.

This article reviews the use of cross-sex hormonal therapy in transmen and reports that it is reasonably safe, suggesting monitoring should be frequent initially but can be less frequent over time.

Women's ovarian hormones and adrenal androgens change throughout life, affecting hair loss and health.

In this study, researchers identified two potential urinary biomarkers, testosterone–glucuronide and 11α-hydroxyprogesterone, along with four candidate biomarkers, to help understand and diagnose polycystic ovary syndrome.

This study suggests that greater sensitivity to androgens, as indicated by higher than grade 2 androgenic alopecia, may reduce the risk of schizophrenia by 8.62 times.

This study found that male and female chicken feather morphology and color patterns can be extrinsically modified through molting and resetting the stem cell niche during regeneration.

Testosterone therapy aims to treat hormone deficiencies and various conditions safely and effectively, but requires careful patient monitoring due to potential side effects.

This study found that measuring reproductive hormone levels in brown bear hair may effectively support non-invasive genetic sampling, though larger samples or more sensitive techniques are needed for broader application.

This study found that among women with PCOS, a bedtime after midnight was independently linked to higher androgen levels and decreased lean muscle mass.

This study reported the development of a novel and reliable liquid chromatographic method to measure testosterone and epitestosterone in human urine, offering sensitive detection for doping control.

This article reviews guidelines for testosterone replacement therapy in late-onset hypogonadism, emphasizing the need for clear indications and appropriate testing before treatment, but provides no new research findings.

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.

This study suggests that any baldness, particularly moderate balding, is associated with a higher risk of fatal prostate cancer in men, supporting a possible link between hair loss and prostate cancer mechanisms.

In this study, DHT and calculated free DHT were linked to higher risks of incident cardiovascular disease and all-cause mortality in elderly men, while total testosterone and calculated free testosterone showed no such associations.

This article discusses treatments for female pattern hair loss, highlighting that oral antiandrogens and topical minoxidil can effectively arrest progression and reverse miniaturization in many patients with mild-to-moderate cases, but it reports no new clinical results.

This review addresses the effects of testosterone on brain development and examines both the established sex differences in brain functions and the debate surrounding structural dimorphism in neuropsychiatric conditions.

This study reports that dynamic interactions between stem cells and their niche, influenced by macro-environmental factors, regulate regenerative behavior in integument pattern formation.

This narrative review concludes that long-term randomized controlled trials are needed to establish clear guidelines for testosterone therapy in women, given the lack of FDA-approved formulations and the variable quality of current treatments.

This review discusses "follicular hypoglycania" as a potential pathology in hair growth disorders and reports that proteoglycan replacement therapy may improve hair loss treatments, though it presents no new clinical trial results.

This study found that cold exposure disrupts the circadian rhythm in cultured human cells by reducing oscillation amplitude, which is restored upon rewarming, while human hair follicle cells showed minimal amplitude sensitivity to temperature changes, suggesting an evolutionary advantage related to Hopf bifurcation dynamics.

This review discusses the multiple layers of environmental controls on hair stem cell homeostasis and suggests that targeting these layers could offer safer regenerative medicine therapies without directly using stem cells.

This article highlights the need for dermatologists to understand male-specific anatomical and physiological differences to optimize aesthetic treatment outcomes for men, but it reports no new clinical results.

This study concluded that the expression of clock genes, specifically BMAL1, in hair follicles is linked to circadian rhythm, and BMAL1 regulates hair growth.

This article reviews the use of hair cortisol concentration as a biomarker to assess long-term stress in both animals and humans, but it reports no new experimental results.

This review discusses the role of melatonin in skin and hair physiology, highlighting clinical evidence for its potential benefits in treating androgenetic alopecia, but does not report new results.