506 citations
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March 2005 in “The Journal of Clinical Endocrinology and Metabolism” 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.
89 citations
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December 2006 in “Lancet Oncology” 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.
72 citations
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April 2008 in “The Journal of urology/The journal of urology” 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.
30 citations
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August 1992 in “The Journal of Clinical Endocrinology and Metabolism” This study found that lowering serum DHT levels with 5 mg finasteride daily did not significantly alter serum gonadotropin levels in healthy young men after 28 days.
October 2025 in “International Journal of Social health” This systematic review reported that among men taking finasteride for benign prostatic hyperplasia, total PSA levels decreased by 30% to 50%, and free PSA by up to 45%, with reductions in prostate volume and PSA density observed as well.