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Did you mean Steroid 5 Alpha-Reductase 1?

Glossary Steroid 5 Alpha-Reductase 1

converts testosterone into a more potent androgen, dihydrotestosterone

Steroid 5 Alpha-Reductase 1 (SRD5A1) is an enzyme that converts testosterone into dihydrotestosterone (DHT), a more potent androgen hormone. This enzyme plays a significant role in the development of male characteristics and is also implicated in conditions like androgenic alopecia (male pattern baldness) and benign prostatic hyperplasia.

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Research

5 / 1000+ results

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 Sexual dimorphism of growth plate prehypertrophic and hypertrophic chondrocytes in response to testosterone requires metabolism to dihydrotestosterone (DHT) by steroid 5‐alpha reductase type 1

27 citations , February 2005 in “Journal of Cellular Biochemistry”

This study found that rat male costochondral chondrocytes, unlike female chondrocytes, respond to testosterone through metabolism to dihydrotestosterone, which shows a maturation-state dependent effect in male growth plate cells.

research A role for steroid 5 alpha-reductase 1 in vascular remodeling during endometrial decidualization

4 citations , November 2022 in “Frontiers in endocrinology”

This study found that intracrine androgen signaling via 5α-reductase is essential for optimal endometrial decidualization and vascular development during this process in mice.

research A Role for Steroid 5 alpha-reductase 1 in Vascular Remodelling During Endometrial Decidualisation

May 2022 in “bioRxiv (Cold Spring Harbor Laboratory)”

This study found that intracrine androgen signaling, mediated by steroid 5α-reductase, is essential for optimal decidualization and vascular development in the endometrium during pregnancy, indicating potential targets for improving age-related fertility issues.

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

5 / 559 results

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 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 Dutasteride might be better for your hairline. Some people have more type 1 5AR activity in their scalp than others.

in Finasteride/Dutasteride 52 upvotes 3 years ago

Dutasteride might be better for hairline due to varying levels of 5AR activity in scalps. Genetic tests can determine if finasteride is enough or if dutasteride is needed.

community What About Phytosterol Alternatives - Rice Bran Oil - Natural DHT Blockers

3 upvotes 2 years ago

The conversation discusses natural DHT blockers like rice bran oil, which may reduce 5α-reductase activity similarly to Minoxidil and Dutasteride. One user argues that finasteride is more reliable and effective than natural alternatives.

community Finasteride success for androgenic alopecia by a 27M physician (NO PICTURES)

4 upvotes 10 years ago

A 27-year-old male physician improved hair density using minoxidil 5% foam and finasteride 1mg every other day, with initial sexual side effects that subsided. He recommends trying finasteride for a year but warns against dutasteride due to potential liver effects.

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learn Overview

learn Neem Oil

natural substance from Neem tree with medicinal and pesticidal properties

learn dehydroepiandrosterone

learn Cyproterone

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

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