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The Hair Follicle and Hair Loss: A Review of DHT, Inflammation, Oxidative Stress, Vascular Signaling and the Biological Pathways Behind Hair Growth

research The Hair Follicle and Hair Loss: A Review of DHT, Inflammation, Oxidative Stress, Vascular Signalling and the Biological Pathways Behind Hair Growth

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

This review suggests that hair loss involves a complex interplay of androgen signaling with various regenerative and inflammatory pathways, challenging the view of dihydrotestosterone as the sole cause.

research The Hair Follicle and Hair Loss: A Review of DHT, Inflammation, Oxidative Stress, Vascular Signalling and the Biological Pathways Behind Hair Growth

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

This narrative literature review by LUSTRAO examines the complex biological mechanisms influencing hair growth and loss, highlighting that androgen signalling, while significant, works within a network involving regenerative, inflammatory, and vascular processes, without establishing it as the sole explanation for conditions like androgenetic alopecia.

research DHT and E2 synthesis-related proteins and receptors expression in male yak skin during different hair follicle stages

4 citations , August 2019 in “General and Comparative Endocrinology”

This study found that in male yaks, 5α-red1 may play a crucial role in synthesizing DHT to promote hair follicle growth, while E2 synthesized by epithelial cells may inhibit this growth through ERα.

research The Effect of Finasteride on the Secretion of Testosterone, DHT, LH, FSH and Tissue Factors in the Testis of NMRI Mice:

June 2021 in “Archives of Advances in Biosciences”

This study suggests that finasteride at doses of 5 mg/kg BW or higher may adversely affect spermatogenesis and male fertility in NMRI mice.

research Secreted Frizzled‐Related Protein 2 ( SFRP2 ) Induces Follistatin‐Like 1 ( FSTL1 ) to Regulate Dihydrotestosterone ( DHT )‐Induced Dermal Papilla Cell Mitochondrial Dysfunction and Senescence

September 2026 in “Aging Cell”

This study found that knocking down SFRP2 in an AGA model improved hair regeneration and reduced cellular dysfunction, suggesting that targeting the SFRP2-FSTL1 axis could be a promising therapeutic strategy for androgenetic alopecia.

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Community Join

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community Desensitize Follicle Sensitivity to DHT?

12 upvotes 2 weeks ago

Hair follicles cannot be desensitized to DHT like allergies; treatments focus on reducing DHT levels or blocking its effects using methods like finasteride, GT20029, or PROTACs. Topical treatments like ceterizine and BPA application are also mentioned.

community We always hear that DUT only lowers scalp DHT by 50% (fin at 40%) but a study within the hair follicle itself shows that DUT nukes DHT to near undetectable levels... so which is it??

in Finasteride/Dutasteride 9 upvotes 1 year ago

Dutasteride significantly reduces DHT levels in hair follicles, potentially more effectively than previously thought. The discussion highlights differences in DHT measurements and the impact on hair loss treatment.

community If PP405 does revive "dead" hair follicles would DHT blockers theoretically be enough to maintain that new hair

in Research/Science 115 upvotes 11 months ago

PP405 may revive dormant hair follicles, and DHT blockers like finasteride or dutasteride could maintain new hair. Combining PP405 with minoxidil might be optimal, but long-term effects and continuous use are uncertain.

community Research: Minoxidil grows hair by suppressing androgen activity (DHT) in hair follicles.

43 upvotes 6 years ago

Minoxidil may suppress androgen activity in hair follicles, potentially aiding in hair growth and prostate cancer treatment. Users discuss the effectiveness of minoxidil and finasteride for hair maintenance and regrowth, with some preferring topical applications over oral due to safety concerns.

community Maybe a stupid question, but does anything that raises serum DHT also automatically raise scalp/follicle DHT?

in Chat 4 upvotes 2 years ago

Creatine may raise serum DHT but not necessarily scalp DHT, and its impact on hair loss is debated. Some users report hair shedding with creatine, while others see no effect.

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Learn

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learn Bicalutamide

Can bicalutamide stop DHT from shrinking your hair follicles? Bicalutamide blocks androgens at the receptor rather than lowering DHT, and some dermatologists prescribe it off-label for women with pattern hair loss. The published evidence is retrospective case series and one small pilot study, with no randomized trial; it is a prescription drug that requires liver monitoring and is contraindicated in pregnancy.

learn PP405

Did you know PP405 peptides can help protect your follicles from DHT? PP405 is not a peptide and does not block DHT: it is an experimental topical gel from Pelage Pharmaceuticals that inhibits the mitochondrial pyruvate carrier, aimed at waking dormant follicles. Its registered Phase 2 trial (NCT06393452) measured safety and tolerability in 78 adults with pattern hair loss; it is not approved and not for sale.

learn Exosomes

What does Fluridil do on the scalp, and how does it block the DHT hormone? Fluridil blocks DHT by binding to androgen receptors in hair follicles, preventing hair loss.

learn Metformin

Does metformin help control DHT levels that trigger androgenic alopecia? Metformin has been shown to lower circulating androgens in women with PCOS, but no published study has measured scalp DHT, 5-alpha reductase activity in the follicle, or hair density in anyone taking it — so its effect on pattern hair loss is untested, and it is not a DHT blocker.

learn SCUBE3

How does SCUBE3 work on hair follicles compared to treatments like minoxidil or finasteride? Laboratory research in mice reports that SCUBE3, a protein released by dermal papilla cells, signals dormant follicles to grow through the TGF-β pathway downstream of Hedgehog; minoxidil and finasteride instead work on blood flow to the follicle and on DHT, and unlike SCUBE3 they have decades of human trial data behind them. SCUBE3 has not been tested in human clinical trials and is not available as a medicine.

learn Hair Transplant

Hair transplantation moves DHT-resistant follicles from a donor area (back and sides of the scalp) into thinning or bald areas. The transplanted hair is generally permanent, though surrounding native hair can keep thinning.

learn Clascoterone

a novel topical treatment that inhibits DHT on androgen receptors

learn Caffeine

the stimulant you know and love can be used topically to stimulate hair

learn Alfatradiol

a synthetic estrogen used topically as an anti-androgen

learn Dutasteride

Heavy duty finasteride that comes with higher risks

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