June 2026 in “The Journal of Sexual Medicine” This study determined that men taking finasteride 1 mg/day exhibited significantly reduced sperm production and morphology compared to controls, although there were no notable changes in hormonal, sexual, or psychological function.
April 2026 in “The Journal of Urology” This study found that men taking 1 mg/day of finasteride had significantly reduced sperm production and morphology but similar hormonal, sexual, and psychological profiles compared to controls, suggesting finasteride affects semen quality without altering other physiological functions.
January 2025 in “Ginekologia Polska” In this study, researchers found that certain vitamin D receptor gene polymorphisms are significantly related to insulin concentration during a glucose tolerance test in young women with hyperandrogenism, but these polymorphisms did not affect bone metabolism or other biochemical parameters.
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June 2023 in “Nutrients” This study found that women with polycystic ovary syndrome had deficient or suboptimal serum vitamin D levels, but the effects of vitamin D on metabolic syndrome and hormonal balance remain unclear.
February 2026 in “European Urology”