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GlossaryDHT Inhibition

reducing dihydrotestosterone to prevent hair loss

DHT inhibition refers to the process of reducing the activity or production of dihydrotestosterone (DHT), a hormone derived from testosterone. DHT is known to contribute to hair loss, particularly in conditions like androgenetic alopecia (male or female pattern baldness). By inhibiting DHT, treatments aim to slow down or prevent hair loss and promote hair regrowth.

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Pharmacokinetic Parameters and Mechanisms of Inhibition of Rat Type 1 and 2 Steroid 5α-Reductases: Determinants for Different In Vivo Activities of GI198745 and Finasteride in the Rat

research Pharmacokinetic parameters and mechanisms of inhibition of rat type 1 and 2 steroid 5α-reductases: determinants for different in vivo activities of GI198745 and finasteride in the rat 3 3Abbreviations: r5AR1, rat 5α-reductase 1; r5AR2, rat 5α-reductase 2; and DHT, dihydrotestosterone.

22 citations , October 2001 in “Biochemical Pharmacology”

GI198745 is more potent and longer-lasting than finasteride, potentially better for treating hair loss.

Dutasteride, A Novel Dual 5-Alpha Reductase Inhibitor, Reduces Serum DHT to a Greater Extent Versus Finasteride and Achieves Maximal Reduction in a Larger Proportion of Patients

research Dutasteride, a novel dual 5-A reductase inhibitor, reduces serum DHT to a greater extent versus finasteride and achieves finasteride maximal reduction in a larger proportion of patients

12 citations , February 2003 in “European Urology Supplements”

Dutasteride reduces DHT more effectively than finasteride.

research Necrosulfonamide promotes hair growth and ameliorates DHT-induced hair growth inhibition

2 citations , April 2024 in “Journal of Dermatological Science”

Necrosulfonamide helps hair grow by blocking a protein linked to hair loss.

research Topical MK-386 (M), an inhibitor of 5α-reductase (5αr) type I, suppresses sebum dht.

February 1996 in “Clinical Pharmacology & Therapeutics”

MK-386 reduces sebum DHT levels.

research Aromatase-independent testosterone conversion into estrogenic steroids is inhibited by a 5α-reductase inhibitor

44 citations , December 2005 in “The Journal of Steroid Biochemistry and Molecular Biology”

Combining 5α-reductase and aromatase inhibitors may better reduce estrogen levels.

research Natural phenylethanoid glycoside forsythoside A alleviates androgenetic alopecia by selectively inhibiting TRPV3 channels in mice

January 2025 in “European Journal of Pharmacology”

Forsythoside A may help treat hair loss by blocking specific channels.

research Hair Growth Promoting Effects of 15-Hydroxyprostaglandin Dehydrogenase Inhibitor in Human Follicle Dermal Papilla Cells

July 2024 in “International Journal of Molecular Sciences”

The inhibitor DPP can promote hair growth.

research Discovery of a novel and highly selective JAK3 inhibitor as a potent hair growth promoter

April 2024 in “Journal of translational medicine”

MJ04, a new compound, effectively promotes hair growth and is a potential topical treatment for hair loss.

research SAT-288 Successful Virilization of a PAIS Patient with a Missense Mutation In The Ligand-binding Domain Of The Androgen Receptor with Combined High-dose Testosterone and Aromatase Inhibitor

April 2019 in “Journal of the Endocrine Society”

A 12-year-old boy with PAIS successfully developed male characteristics using high-dose testosterone and anastrozole.

research FCE 28260, a new 5α-reductase inhibitor: In vitro and in vivo effects

17 citations , June 1996 in “The Journal of Steroid Biochemistry and Molecular Biology”

FCE 28260 is a stronger and longer-lasting inhibitor of 5α-reductase than finasteride, which may make it a better treatment for certain medical conditions.

research Oral Testosterone With and Without Concomitant Inhibition of 5α-Reductase by Dutasteride in Hypogonadal Men for 28 Days

11 citations , December 2010 in “The Journal of Urology”

Taking oral testosterone with or without dutasteride increases testosterone levels and could be an effective treatment for low testosterone.

research Hemp Seed-Derived Exosomes Protect Against Dihydrotestosterone-Induced Chicken Feather Growth Inhibition

August 2025 in “Pharmaceuticals”

Hemp seed-derived exosomes help restore feather growth in chickens affected by DHT.

research The Rationale for Inhibiting 5α-Reductase Isoenzymes in the Prevention and Treatment of Prostate Cancer

108 citations , February 2008 in “The Journal of urology/The journal of urology”

Inhibiting 5α-reductase can help reduce prostate cancer risk and improve treatment.

Effects of the Anti-Androgen Finasteride on 5α-Reduction of Androgens in the Presence of Progesterone in Human Gingival Fibroblasts: Modulatory Actions of the Alkaline Phosphatase Inhibitor Levamisole

research Effects of the anti-androgen finasteride on 5α-reduction of androgens in the presence of progesterone in human gingival fibroblasts: modulatory actions of the alkaline phosphatase inhibitor levamisole

9 citations , August 2000 in “Journal of Periodontal Research”

Finasteride reduces testosterone conversion, progesterone lessens this, and levamisole enhances finasteride's effect.

research COMBINATION OF AN ANTIANDROGEN AND A 5α-REDUCTASE INHIBITOR: A FURTHER STEP TOWARDS TOTAL ANDROGEN BLOCKADE?

9 citations , March 1991 in “Endocrinology”

Using two drugs together, Flutamide and 4-MA, is more effective for blocking male hormones than using each one alone.

research Marked Suppression of Dihydrotestosterone in Men with Benign Prostatic Hyperplasia by Dutasteride, a Dual 5α-Reductase Inhibitor

408 citations , May 2004 in “The Journal of clinical endocrinology and metabolism/Journal of clinical endocrinology & metabolism”

Dutasteride more effectively lowers DHT levels in men with enlarged prostates than finasteride.

research The clinical development of a 5α-reductase inhibitor, finasteride

211 citations , November 1990 in “The Journal of Steroid Biochemistry and Molecular Biology”

Finasteride effectively treats BPH, but needs more trials to understand potential.

research The Effect of 5α-Reductase Inhibition with Dutasteride and Finasteride on Semen Parameters and Serum Hormones in Healthy Men

195 citations , February 2007 in “The Journal of Clinical Endocrinology and Metabolism”

Dutasteride and finasteride may reduce sperm count and volume but don't affect movement or shape; effects are reversible after stopping.

research Effects of Finasteride (MK-906), a 5α-Reductase Inhibitor, on Circulating Androgens in Male Volunteers*

147 citations , April 1990 in “The Journal of Clinical Endocrinology and Metabolism”

Finasteride safely lowers DHT levels without affecting testosterone.

Mechanism-Based Inhibition of Human Steroid 5α-Reductase by Finasteride: Enzyme-Catalyzed Formation of NADP-Dihydrofinasteride, a Potent Bisubstrate Analog Inhibitor

research Mechanism-Based Inhibition of Human Steroid 5α-Reductase by Finasteride: Enzyme-Catalyzed Formation of NADP−Dihydrofinasteride, a Potent Bisubstrate Analog Inhibitor

136 citations , March 1996 in “Journal of the American Chemical Society”

Finasteride effectively blocks enzyme causing male pattern baldness.

Effect of Testosterone Supplementation With and Without a Dual 5α-Reductase Inhibitor on Fat-Free Mass in Men With Suppressed Testosterone Production

research Effect of Testosterone Supplementation With and Without a Dual 5α-Reductase Inhibitor on Fat-Free Mass in Men With Suppressed Testosterone Production

124 citations , March 2012 in “JAMA”

Testosterone's muscle-building effects do not require its conversion to DHT.

research External genitalia abnormalities in male rats exposed in utero to finasteride, a 5α-reductase inhibitor

122 citations , July 1990 in “Teratology”

Finasteride exposure in pregnancy causes genital abnormalities in male rats.

The Dihydrotestosterone Hypothesis of Prostate Cancer and Its Therapeutic Implications

research The dihydrotestosterone (DHT) hypothesis of prostate cancer and its therapeutic implications

57 citations , January 1986 in “The Prostate”

The document suggests that targeting the hormone DHT could be a more effective treatment for prostate cancer than targeting testosterone.

Effects of the 5α-Reductase Inhibitor Finasteride on Serum Levels of Gonadal, Adrenal, and Hypophyseal Hormones and Its Clinical Significance: A Prospective Clinical Study

research Effects of the 5α-Reductase Inhibitor Finasteride on Serum Levels of Gonadal, Adrenal, and Hypophyseal Hormones and its Clinical Significance: A Prospective Clinical Study

56 citations , April 1998 in “Steroids”

Finasteride reduces hair loss and treats BPH without major hormone changes, but may cause sexual dysfunction.

Overexpression of Aldo-Keto Reductase 1C3 in LNCaP Cells Diverts Androgen Metabolism Towards Testosterone Resulting in Resistance to the 5α-Reductase Inhibitor Finasteride

research Overexpression of aldo-keto reductase 1C3 (AKR1C3) in LNCaP cells diverts androgen metabolism towards testosterone resulting in resistance to the 5α-reductase inhibitor finasteride

45 citations , January 2012 in “The Journal of Steroid Biochemistry and Molecular Biology”

Too much AKR1C3 enzyme causes resistance to finasteride by increasing testosterone.

Inhibition of Rat 5α-Reductase Activity and Testosterone-Induced Sebum Synthesis in Hamster Sebocytes by an Extract of Quercus Acutissima Cortex

research Inhibition of Rat 5α-Reductase Activity and Testosterone-Induced Sebum Synthesis in Hamster Sebocytes by an Extract ofQuercus acutissimaCortex

37 citations , January 2015 in “Evidence-based Complementary and Alternative Medicine”

An extract from Quercus acutissima bark was found to reduce sebum production and block an enzyme linked to acne.

Inhibition of the Androgen Receptor by Antisense Oligonucleotides Regulates the Biological Activity of Androgens in SZ95 Sebocytes

research Inhibition of the Androgen Receptor by Antisense Oligonucleotides Regulates the Biological Activity of Androgens in SZ95 Sebocytes

29 citations , February 2007 in “Hormone and metabolic research”

Blocking the androgen receptor in skin cells reduces their growth response to male hormones, suggesting a possible treatment for skin conditions linked to androgens.