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research LY191704: a selective, nonsteroidal inhibitor of human steroid 5 alpha-reductase type 1.

53 citations , June 1993 in “Proceedings of the National Academy of Sciences of the United States of America”

This study identified LY191704 as a specific noncompetitive inhibitor of human 5 alpha-reductase type 1, which may be useful in treating endocrine disorders related to DHT overproduction.

research Selective non-steroidal inhibitors of 5α-reductase type 1

49 citations , January 2004 in “Journal of steroid biochemistry and molecular biology/The Journal of steroid biochemistry and molecular biology”

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

Avicequinone C Isolated from Avicennia Marina Exhibits 5α-Reductase Type 1 Inhibitory Activity Using an Androgenic Alopecia Relevant Cell-Based Assay System

research Avicequinone C Isolated from Avicennia marina Exhibits 5α-Reductase-Type 1 Inhibitory Activity Using an Androgenic Alopecia Relevant Cell-Based Assay System

19 citations , May 2014 in “Molecules”

This study found that the methanolic heartwood extract of Avicennia marina significantly inhibits 5α-reductase type 1, reducing 5α-DHT production by 52% in a cell-based assay with human hair dermal papilla cells.

research Novel type 1 5a-reductase Inhibitors with Antiproliferative Potential on LNCaP cells

June 2023 in “Oriental Journal of Chemistry/Oriental journal of chemistry”

This study demonstrated that derivatives of dehydroepiandrosterone (2a-b, 3a-f, and 4a-f) significantly reduced viable LNCaP prostate cancer cells, suggesting potential therapeutic use for metastatic prostate cancer, while finasteride did not alter cell viability.

Natural Product-Inspired Bis(Trifluoromethyl) Phenyl Hydroxycinnamate Derivatives as Promising Nonsteroidal Inhibitors of Human Steroid 5α-Reductase Type-1: Synthesis, In Vitro, and In Silico Studies

research Natural Product-Inspired Bis(trifluoromethyl) Phenyl Hydroxycinnamate Derivatives as Promising Nonsteroidal Inhibitors of Human Steroid 5α-Reductase Type-1: Synthesis, In Vitro, and In Silico Studies

August 2025 in “ACS Omega”

This study synthesized and evaluated hydroxycinnamate derivatives for their ability to inhibit human SRD5A1, finding that three compounds showed significant inhibitory activity and low cytotoxicity. Compound 10a notably reduced SRD5A1 protein expression in cells, suggesting potential for nonsteroidal treatment of androgen-related conditions.

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Community Join

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community Did anybody use beta sisterol for hair loss? I saw in many articles in the internet that said that beta sisterol blocks dht by inhibiting 5a reductase type 2 enzyme and some reviews of people who said that it worked better than saw palmetto in terms of stoping hair loss and helping prostate.

in Research/Science 9 upvotes 3 years ago

Beta-sitosterol may inhibit 5-alpha reductase type 2 enzyme, potentially reducing DHT levels and promoting hair growth, similar to finasteride but possibly with fewer side effects. Its effectiveness and side effects compared to other treatments like saw palmetto and finasteride remain uncertain due to limited research.

community Supposedly dairy contains precursors to DHT that are already 5a-reduced and convert to DHT independent of 5a-reductase inhibition

26 upvotes 5 months ago

Dairy may contain DHT precursors that could affect hair loss and prostate health, with some users noting reduced hair shedding after eliminating dairy. Individual responses to dairy and DHT blockers vary, with some attributing hair health to diet changes and others seeing no impact.

community A repository of links to current scientific research and findings into the nature of and relating to side-effects for Finasteride/Dutasteride/5a-reductase inhibitors.

17 upvotes 7 years ago

Finasteride and dutasteride, used for hair loss, can cause sexual dysfunction, depression, and suicidal thoughts, with some effects persisting after stopping. The post stresses the importance of being aware of these risks.

community 1 year on fin. No results. I give up.

in Finasteride/Dutasteride 43 upvotes 3 years ago

A user who has been taking finasteride, minoxidil, and microneedling for one year with no results, and the replies discuss other treatments, including dutasteride, which is feared due to potential side effects.

community 1.5 years finasterite. 1 tablet daily. Don't see any improvement.

in Is this regrowth? 114 upvotes 10 months ago

The user has been taking finasteride for 1.5 years without seeing improvement in hair regrowth. Suggestions include adding minoxidil or switching to dutasteride, with concerns about side effects.

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Learn

5 / 801 results

learn RU58841

a potent but unapproved and potentially problematic topical anti-androgen

learn Minoxidil

An essential vasodilator with some anti-androgenic effects

learn Fluridil

a topical anti-androgen with less systemic involvement

How is Fluridil different from other DHT blockers like finasteride? Fluridil is a topical androgen-receptor blocker applied to the scalp, while finasteride is an oral 5-alpha-reductase inhibitor that lowers DHT throughout the body. Finasteride is FDA-approved and far better studied; Fluridil rests on one 43-man trial and is not licensed as a hair-loss medicine, so its long-term safety and effect size are unknown.

learn Pyrilutamide

highly targeted anti-androgen that might have minimal systemic effects

learn Cyproterone

a synthetic anti-androgen and weak progestogen that inhibits DHT binding to androgen receptor

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