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    Did you mean 5α-reductase inhibitors?
    Glossary 5α-reductase inhibitors

    block enzyme converting testosterone to hair-loss-causing DHT

    5α-reductase inhibitors, also known as 5-ARIs, are medications that block the enzyme 5α-reductase. This enzyme converts testosterone into dihydrotestosterone (DHT), a hormone that can contribute to conditions like male pattern baldness and benign prostatic hyperplasia (BPH). By inhibiting this enzyme, 5-ARIs can help reduce hair loss and shrink an enlarged prostate.

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    1. Does caffeine inhibit 5-α-reductase? Reddit · 27 Dec 2019
    2. FCE 28260: A Forgotten 5α-Reductase Inhibitor Community · 22 Aug 2024
    3. Androsterone as a Neurosteroid Replacement Strategy for 5α-Reductase Inhibitor–Associated Sexual and Affective Dysfunction Reddit · 15 Jul 2026
    4. BREAKTHROUGH: I’m a radiochemist and discovered a radioactive isotope scalp serum that OUTPERFORMS Minoxidil and 5-AR inhibitors! (Lab Data Inside) Reddit · 10 Jun 2025
    5. Allopregnanolone deficiency by 5-ari inhibition (fin/dut users) Reddit · 11 Dec 2023
    6. Why does this industry still revolve around 5-AR inhibitors? Reddit · 14 Jun 2021
    7. 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. Reddit · 11 May 2023
    8. Minoxidil is a 5ar inhibitor according to research Reddit · 4 Oct 2025
    9. Similar 5ar inhibitors to fin? Reddit · 26 Jun 2021
    10. 4 months on oral dutasteride + one month and 3 weeks on topical minoxidil 5% Reddit · 23 May 2026
    11. Three months 0.5mg Dutasteride and 5% topical Minoxidil daily Reddit · 22 May 2026
    12. A better treatment would be a localized 5ar inhibitor that breaks down when it enters blood or leaves hair follicle Reddit · 13 May 2025
    13. Low dose spiro with 5ARI inhibitor Reddit · 20 Dec 2024
    14. 1 year of daily 0,5 mg Dutasteride Reddit · 24 Jun 2024
    15. [Discussion] Trichoscopy in sudden-onset AGA: Pathology and reversibility of "Yellow Dots" without 5AR-inhibitors? Reddit · 22 Mar 2026
    16. Guys if you can’t take 5AR inhibitors still get on treatment ASAP Reddit · 6 Jan 2026
    17. 1 year 5-ar. Blood test results Reddit · 29 Jul 2025
    18. Meta analysis of minoxidil only vs 5AR inhibitors Reddit · 16 May 2025
    19. Can gains from stemoxydine be permanently kept with 5AR inhibitors? Reddit · 29 Dec 2024
    20. FINALLY stopped shedding constantly after 1 year on 5ar inhibitors!! Moral of the story: Just wait Reddit · 15 Oct 2024
    21. How come Dut doesn’t cause more brain problems than fin if it inhibits Type 1 5AR? Reddit · 26 Jun 2024
    22. Which Saw Palmetto is good for blocking 5 alpha reductase, Serenoa repens or Chamaerops humilis? Reddit · 26 Jun 2020
    23. Has anyone tried the Strut Finasteride Topical Gel? Reddit · 28 Mar 2021
    24. Fin/Dut and Metabolism Speeds… Reddit · 28 Aug 2024
    25. 22 | ~34 Months Finasteride Update Reddit · 2 Aug 2024
    26. Help! Gyne after 20 years of taking Dut Reddit · 11 Aug 2024
    27. Dermatologist denied prescribing oral dutasteride because it’s not FDA approved BUT did prescribe ORAL minoxidil 😂 Reddit · 19 Jul 2024
    28. Does it look like improvement? 3 months on oral Minoxidil Reddit · 28 Jun 2024
    29. Has anyone ever tried using (all topicals) finasteride + minoxidil + rosemary oil + castor oil + stemoxydine all over the course of a few months/years? Reddit · 4 Apr 2024
    30. Switched from finasteride to dutasteride - 2 month update Reddit · 8 Nov 2023