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This study found that testosterone therapy improved physical performance and strength in older men with low testosterone over 36 months, whether administered alone or with finasteride.

This review discusses the cutaneous serotoninergic/melatoninergic system's potential role in skin function and resilience against environmental and internal stresses, but does not report new experimental findings.

This study provides evidence that human skin contains genes and enzymes necessary for producing serotonin and melatonin.

In this study, administering 5alpha-reductase inhibitors reduced dihydrotestosterone levels and was associated with mild, reversible decreases in semen parameters in healthy men.

This study observed that androgen levels rise with pubic hair development in Tanner stages, differing by sex and age, with DHEA showing a significant prepubertal increase especially in precocious adrenarche.

This study observed that serum levels of oestradiol, testosterone, and androstenedione increase rapidly with the onset of puberty and continue to rise after menarche, with anovulatory cycles being common in early postmenarchal girls.

This study found that women with androgenetic alopecia or alopecia areata have significantly lower serum ferritin levels than those without hair loss, suggesting a potential link between these types of alopecia and decreased iron stores.

This study found that spironolactone reduced serum androstenedione and anagen hair shaft diameter in hirsute patients but did not significantly alter unbound testosterone levels, suggesting its effects are primarily peripheral.

This review discusses the effects of estrogens on skin aging and highlights the potential benefits of estrogen replacement therapy and selective estrogen receptor modulators for improving skin health in postmenopausal women, but reports no new clinical findings.

This study demonstrated the development of high-density protein microarrays allowing for antibody binding characterization and serum profiling from patients with autoimmune diseases, suggesting potential for diagnostic marker discovery.

In this study, 1 mg/day finasteride lowered serum PSA concentration in men aged 40–60, suggesting that PSA adjustment recommendations for prostate cancer screening using 5 mg/day finasteride should also apply to this lower dose for hair loss treatment.

Sericin hydrogels heal skin wounds well, regrowing hair and glands with less scarring.

This study found that mouse skin can produce and metabolize serotonin and N-acetylserotonin, with activity influenced by location, physiological skin status, cell type, and mouse strain.

This study found no direct relationship between low serum ferritin and chronic diffuse telogen hair loss in women, questioning the usefulness of serum ferritin measurement and iron supplementation for managing this condition.

This study found that treatment with cyproterone acetate and ethinyl oestradiol increased hair density in women with diffuse androgen-dependent alopecia, particularly when serum ferritin levels were above 40 μg/l.

This study found that three genetic loci, including the newly identified JMJD1C, are associated with circulating testosterone and dihydrotestosterone levels, explaining a small portion of their variance in European men.

This study found that testosterone replacement, with or without finasteride, did not lead to significant cognitive improvements over 36 months in healthy older men without prior cognitive impairment.

In this study, administering dexamethasone rapidly normalized elevated steroid levels in girls with premature adrenarche.

This study observed that patients with various types of hair loss had significantly lower serum zinc levels compared to healthy controls, suggesting zinc disturbance may play a role in the condition.

This study found that finasteride significantly reduced serum dihydrotestosterone levels, confirming its efficacy as a 5a-reductase inhibitor, while Permixon showed no effect in healthy male volunteers.

This study found that 1-year use of 5alpha-reductase inhibitors, dutasteride or finasteride, significantly lowered dihydrotestosterone levels without adversely affecting bone density, lipids, or hemoglobin in normal men.

In this study, distinct metabolic profiles were identified in women with PCOS, suggesting potential biomarkers for diagnosis based on changes in lipid and androgen metabolism.

This study found that 38% of women with hair loss had a biotin deficiency, suggesting oral biotin supplementation should be based on confirmed biotin deficiency rather than as a general treatment.

This study found that belimumab helped achieve low disease activity in over 40% of systemic lupus erythematosus patients in real-life settings, alongside reduced corticosteroid use and fewer flares.

In this study, oral zinc supplementation for twelve weeks increased serum zinc levels in alopecia areata patients with low zinc, showing positive hair regrowth in 66.7% of participants, though this was not statistically significant.

In this study, finasteride doses as low as 0.2 mg per day significantly reduced both scalp skin and serum DHT levels in men with androgenetic alopecia.

This study found that low serum ferritin and vitamin D2 levels are associated with hair loss in females with chronic telogen effluvium and female pattern hair loss, suggesting potential benefits of screening and supplementation.

In this study, serum from patients with alopecia areata or universalis did not affect hair growth in transplanted scalp skin grafts on nude mice, despite increased deposition of immunoreactants.

This article discusses the controversy over serum ferritin levels in diagnosing iron deficiency in women with hair loss but reports no new findings, emphasizing the need for consistent reference ranges.

This study found that patients with alopecia areata had significantly lower serum zinc levels, which correlated inversely with disease severity, duration, and resistance to therapies, suggesting zinc assessment as a marker of disease status.