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Did you mean 5-alpha-reductase inhibitor?

Glossary 5-alpha-reductase inhibitor

blocks enzyme converting testosterone to dihydrotestosterone (DHT)

A 5-alpha-reductase inhibitor is a type of medication that blocks the enzyme 5-alpha-reductase, which is responsible for converting testosterone into dihydrotestosterone (DHT). By reducing DHT levels, these inhibitors can help treat conditions like male pattern baldness and benign prostatic hyperplasia (BPH).

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Research

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research Risk of Type 2 Diabetes Mellitus in New Users of 5-Alpha Reductase Inhibitors: A Nationwide Historical Cohort Study

January 2026 in “Yonsei Medical Journal”

Finasteride and dutasteride have little effect on Type 2 Diabetes risk.

research Effects of finasteride, a type 2 5-alpha reductase inhibitor, on fetal development in the rhesus monkey (Macaca mulatta)

67 citations , February 1997 in “Teratology”

This study demonstrated that high oral doses of finasteride caused external genital abnormalities in male rhesus monkey fetuses, but intravenous doses did not lead to abnormalities.

research Synthesis and biological evaluation of esters of 16-formyl-17-methoxy-dehydroepiandrosterone derivatives as inhibitors of 5α-reductase type 2

5 citations , November 2015 in “Journal of Enzyme Inhibition and Medicinal Chemistry”

This study found that aliphatic ester moieties in 16-formyl-17-methoxy dehydroepiandrosterone derivatives increased their potency as 5α-reductase type 2 inhibitors in vitro compared to finasteride.

research Design, synthesis and biological evaluation of novel androst-3,5-diene-3-carboxylic acid derivatives as inhibitors of 5α-reductase type 1 and 2

8 citations , June 2017 in “Steroids”

This study evaluated novel steroid compounds for their ability to inhibit 5α-reductase, showing that compound 16a significantly reduced rat prostate weight more than epristeride and exhibited excellent in vitro inhibitory potency, indicating its potential as a lead candidate for further benign prostatic hyperplasia drug research.

In Silico Structure-Based Drug Design Approach To Evaluate Quercetin And Kaempferol As Dual Inhibitors Of JAK3 Kinase And 5-Alpha Reductase Type II With ADMET Profiling

research In Silico Structure-Based Drug Design Approach To Evaluate Quercetin And Kaempferol As Dual Inhibitors Of Jak3 Kinase And 5-Alpha Reductase Type II with ADMET Profiling

June 2026 in “Zenodo (CERN European Organization for Nuclear Research)”

In this study, quercetin and kaempferol, two plant-derived flavonoids, showed stronger binding affinities to JAK3 kinase and moderate binding to 5-alpha reductase type 2, suggesting their potential as natural treatments for androgenetic alopecia, with quercetin demonstrating suitable properties for topical application.

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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 5 alpha reductase type 1 is in brain tissue producing the main endogenous gabaergic allopregnanolone, not 2. How can finasteride as a 5ar2 lower that?

27 upvotes 1 year ago

Finasteride and dutasteride are discussed for hair loss, with concerns about their effects on neurosteroids and potential side effects like depression. Alternatives like topical estrogen and lifestyle changes are considered, with varying opinions on mental health and hair regrowth.

community We need actual hair loss studies on Epristeride

in Research/Science 6 upvotes 1 year ago

Epristeride is a selective 5 alpha reductase type 2 inhibitor that may reduce scalp DHT similarly to finasteride, with potentially fewer side effects. It is suggested that combining epristeride with finasteride or dutasteride could enhance hair loss treatment effectiveness.

community Was scared to try fin and jumped straight to 2.5mg Dut?

36 upvotes 1 week ago

The user started with oral minoxidil and switched to 2.5mg dutasteride, experiencing significant hair growth without side effects. They believe dutasteride has fewer side effects than finasteride due to its action on both type 1 and 2 5-alpha reductase enzymes.

community Theoretically won't this be better than finasteride? Azelaic acid + zinc

9 upvotes 3 years ago

The conversation discusses using zinc sulphate and azelaic acid to inhibit 5 alpha-reductase activity, which could potentially treat androgen-related skin conditions like hair loss. Combining these with vitamin B6 could enhance the effect, potentially offering an alternative to finasteride.

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