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This study reported that 5 alpha-reductase type 2 is the predominant enzyme in pubic skin fibroblasts across normal men, women, and hirsute patients, suggesting potential treatment options for idiopathic hirsutism.

This review discusses the biochemical properties and clinical significance of 5 alpha-reductase isozymes and reports no new clinical results.

This review highlights the challenges in screening for steroid 5 alpha-reductase inhibitors and discusses significant variability in the effectiveness of finasteride and dutasteride, calling for standardized testing methods to develop safer, more specific inhibitors from herbal preparations.

This study identified that derivatives 4, 4b, and 4c strongly inhibited the enzyme type 1 5α-reductase and decreased reproductive organ weights in hamsters, suggesting potential as prodrugs for prostate tumor growth inhibition.

This review discusses the development and selectivity of 5 alpha-reductase inhibitors, particularly non-steroidal ones, and reports no new clinical trial results.

This study found that exercise decreases the expression of 5αR1, thereby enhancing the PI3K/AKT signaling pathway in PCOS rats.

This study found that components derived from Uromedic® pumpkin seeds, especially Δ7-sterols, may inhibit DHT production and AR binding, potentially benefiting prostate and bladder health by moderating these mechanisms.

This study found that 2-hydroxy-1,4-naphthoquinone was the most effective inhibitor of steroid 5α-reductase, showing stronger inhibition than avicequinone C in HaCaT cell assays.

In this study, researchers found that crude extracts from Avicennia marina and its component avicequinone C inhibit mechanisms contributing to androgenic alopecia in vitro, including 5α-reductase activity and DHT-AR interactions, potentially promoting hair growth and delaying the catagen phase in human dermal papilla cells.

This study generated a pharmacophoric model for both isoforms of steroidal 5α-reductase using 6-azasteroids, providing a structural framework for designing new inhibitors.

This review compiles existing information on the pathogenesis of androgenetic alopecia, highlighting its genetic, hormonal, and environmental factors, but reports no new clinical findings.

This study established that a human epidermal model can be utilized to assess 5alpha-reductase activity and evaluate enzyme modulators, such as finasteride, for dermatological applications.

BPH treatment improved with personalized medicine, new drugs, and less invasive surgeries.

This study used machine learning to develop classifiers for identifying effective inhibitors of 5α-reductase isozyme 2, achieving high performance in distinguishing potent from weak inhibitors.

This study observes the expression of mRNA for androgen receptor, 5α‐reductase, and 17β‐hydroxysteroid dehydrogenase in human dermal papilla cells.

This study found that finasteride treatment in male rats led to enduring effects on depressive-like behavior, hippocampal neurogenesis and neuroinflammation, and gut microbiota composition after withdrawal.

This study found that SDR5A1 gene expression was similar between hirsute women, normal women, and men, suggesting it may not explain differences in hair growth among these groups.

This study found that ethanol extract of Tubtim Chumphae rice bran downregulates SRD5A gene expression, similarly to finasteride, suggesting potential use as an anti-hair loss product.

This study found that inhibiting 5α-reductase in molluscs provokes a specific shell morphology, suggesting gastropods might have unique 5α-reductase substrates absent in vertebrates.

This study suggests that finasteride may inhibit the enzyme PNMT, potentially contributing to its sexual and psychological side effects.

This study reported high analytical performance of an RMP for DHT quantification, with the ability to differentiate between 5α-DHT and 5β-DHT isomers, making it suitable for routine assay standardization and clinical sample evaluation.

This study examined the stability of two 5α-reductase inhibitors in Tectona grandis extracts, finding that they are more stable in acidic environments and degrade rapidly under heat and light unless protected, suggesting the need for careful storage when developing anti-hair loss medications.

In this study, researchers using molecular docking techniques found that 12-Methoxy carnosic acid from rosemary shows promising potential as a natural inhibitor of the 5 alpha reductase enzyme, which is involved in hair loss, suggesting its efficacy compared to finasteride.

This study found that Eclipta alba extracts exhibit 5α-reductase inhibitory activity, with the methanolic extract showing a higher concentration of β-sitosterol compared to petroleum ether extract, indicating potential for treating androgenic conditions like male pattern baldness.

This study presents the first report on cloning and characterizing the full-length cDNA of SRD5A1 in Indian catfish (Clarias magur), revealing expression differences across reproductive phases and increased expression post-Ovatide administration in ovaries and testis.

This study concludes that rhesus macaques are a suitable model for testing the pharmacological properties of finasteride and other 5aR inhibitors, due to their biochemical similarity to humans.

This study found that Piper nigrum leaf extract showed in vivo anti-androgenic activity and potent 5α-reductase inhibitory effects, with piperine and (−)-cubebin identified as active components.

This study found that certain curcumin analogs derived from natural plant sources exhibit anti-androgen activity by inhibiting steroid 5-alpha reductase, identifying key structural features for their potency and safety in treating androgen-related conditions.

MK-386 and finasteride together effectively reduce DHT levels, potentially treating acne and male pattern baldness.

This article reviews treatment-induced sexual dysfunctions related to 5-alpha-reductase inhibitors and reports no new results; it highlights the need to better define and understand this controversial topic.