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Glossary5α-reductase

enzyme converting testosterone into potent dihydrotestosterone (DHT)

5α-reductase is an enzyme that converts testosterone into dihydrotestosterone (DHT), a more potent androgen hormone. This enzyme plays a significant role in various biological processes, including the development of male characteristics and the regulation of hair growth. Inhibitors of 5α-reductase, such as finasteride, are commonly used to treat conditions like male pattern baldness and benign prostatic hyperplasia.

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Increased Scalp Skin and Serum 5a-Reductase Reduced Androgens in a Man Relevant to the Acquired Progressive Kinky Hair Disorder and Developing Androgenetic Alopecia

research Increased Scalp Skin and Serum 5a-Reductase Reduced Androgens in a Man Relevant to the Acquired Progressive Kinky Hair Disorder and Developing Androgenetic Alopecia

11 citations, September 1997 in “Archives of Dermatology”

Reduced androgens linked to kinky hair disorder and hair loss; 5a-reductase inhibitors may help.

Therapeutic Effect of Nepenthes Kampotiana Lecomte Ethanol Extract on Androgenic Alopecia through the Inhibition of Apoptosis and 5α-Reductase Activity

research Therapeutic Effect of Nepenthes Kampotiana Lecomte Ethanol Extract on Androgenic Alopecia through the Inhibition of Apoptosis and 5α-Reductase Activity

August 2023

Nepenthes kampotiana extract can potentially prevent hair loss and could be an effective treatment for common baldness.

research Targeting JAK/STAT and Wnt/Beta-Catenin Pathways and 5-Alpha-Reductase Activity to Develop an Effective Anti-Hair Loss Product

November 2022 in “Journal of Investigative Dermatology”

The lotion with specific plant extracts effectively increased hair growth and improved hair cycle in subjects after 3 months.

research Is There an Association Between 5α-Reductase Inhibitors and Metabolic Syndrome? A Narrative Review of the Literature

June 2024 in “Reviews on Recent Clinical Trials”

Finasteride and dutasteride may cause metabolic issues like liver disease and diabetes.

research Screening 5α-Reductase Inhibitors from Plant Extraction for Treatment of Androgenic Alopecia In Vitro

January 2010 in “Research and Practice on Chinese Medicines”

Coffee extract and caffeotannic acid can help treat hair loss.

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community Finasteride affects both 5a reductase and 5b reductase

6 upvotes 5 years ago

Finasteride not only inactivates the 5a reductase enzyme but also affects the 5b reductase enzyme in a dose-dependent manner, which can impact sexual behavior and brain activity. The user experienced significant hair regrowth and side effects on 1mg of finasteride, which diminished after reducing the dose to 0.5mg, leading to no side effects and further hair improvement.

community From the research study: "Dihydrotestosterone and the concept of 5a-reductase inhibition in human benign prostatic hyperplasia" - G. Bartsch, R.S. Rittmaster, H. Klocker (2002) in the "World Journal of Urology".

in Research/Science 23 upvotes 2 years ago

Dutasteride is a stronger 5AR inhibitor than finasteride and can significantly lower DHT levels. Reduced doses of dutasteride may lower side effects.

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.

in Finasteride 17 upvotes 5 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 Massive study on finasteride side effects released

in Finasteride/Dutasteride 83 upvotes 2 years ago

The release of a study on 5a-reductase inhibitors (finasteride and dutasteride) which showed an increased risk of depression, dementia, decreased libido, and reduced semen load as potential side effects; discussion around other forms of hair loss treatments such as topical minoxidil, RU58841, or opting to accept baldness; and advice to consider professional help for deeper issues related to hair loss.

community Mechanism of action of alfatradiol (17 alpha estradiol)

in Research/Science 6 upvotes 6 months ago

The conversation discusses the mechanism of action of alfatradiol (17 alpha estradiol) in treating hair loss. It explores theories that it either inhibits 5 alpha reductase to prevent T->DHT conversion or aromatizes scalp T into 17-alpha-estradiol to save hair.

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