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research STAT5 Activation in the Dermal Papilla Is Important for Hair Follicle Growth Phase Induction

32 citations , April 2016 in “Journal of Investigative Dermatology”

This study found that STAT5 activation in the dermal papilla acts as a key switch to trigger anagen entry in postdevelopmental hair follicle cycling.

research Morus alba Root Extract Induces the Anagen Phase in the Human Hair Follicle Dermal Papilla Cells

28 citations , July 2021 in “Pharmaceutics”

This study found that Morus alba root extract activates β-catenin in hair follicle dermal papilla cells, promoting the transition to the anagen phase and enhancing hair growth factor secretion.

research Exposure to gamma-rays at the telogen phase of the hair cycle inhibits hair follicle regeneration at the anagen phase in mice

November 2013 in “Institutional Repositories DataBase (IRDB)”

In this study, γ-ray exposure in mice decreased hair follicle density and pigmentation, suggesting damage to stem cells affecting hair follicle regeneration.

research Transcriptomic profiling of dermal papilla cells across growth phases, hair follicle types, and sexes in cashmere goats

July 2026 in “Scientific Data”

In this study, researchers analyzed dermal papilla cells from cashmere goats and identified 3,857 differentially expressed genes associated with hair growth phases, follicle types, and sex, providing a foundational resource for future efforts to improve cashmere quality and yield.

research Histochemistry of the human hair follicle with consideration of anagen phases I to VI

18 citations , June 1992 in “Acta Histochemica”

Human hair follicles have a unique cell distribution and differentiation pattern during growth.

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Community Join

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community THE HARSH REALITY OF THE HAIR FOLLICLE’s CYCLICAL LIFE? 6.5 months of treatment

in Progress Pictures 399 upvotes 1 year ago

A user shared their 6.5-month experience with topical finasteride (2%) and minoxidil (5%), noting initial progress followed by a significant shedding phase. Others in the conversation reassured that shedding is normal and suggested staying consistent with the treatment for potential regrowth.

community Pelage PP405: New Hair Growth from Inactive Follicular Units - Phase 2a results at AAD 2026

1080 upvotes 5 months ago

PP405, a topical treatment, shows promise for hair growth by activating inactive follicles, with 66% of participants experiencing positive results. The treatment is well-tolerated and may proceed directly to Phase 3 trials, offering a potential alternative to minoxidil and finasteride.

community UCLA scientists found a molecule — PP405 — that wakes up sleeping hair follicles and tells them, “Do your job.”

1350 upvotes 1 year ago

PP405 is a promising molecule that may reactivate dormant hair follicles, potentially offering a new treatment for hair loss. It is in phase 2 trials, with possible availability between 2027 and 2030.

community TDM-105795 phase 2 results are in!

27 upvotes 2 years ago

TDM-105795 showed promising hair growth results, with higher efficacy than placebo and minimal side effects. It activates dormant hair follicle stem cells and may maintain gains without immediate loss, unlike minoxidil.

community PP405: The Ultimate Hair Loss Drug for Complete Hair Growth

211 upvotes 1 year ago

PP405 is a new hair loss treatment in phase 2 trials that may promote hair growth by increasing lactate production and activating hair follicle stem cells. It could potentially replace hormone-disrupting treatments like Minoxidil and finasteride.

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Learn

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learn Hair Transplant

What happens after a hair transplant? Expect mild swelling and redness, with new hair growth starting in 3 to 6 months.

learn Fluridil

Can daily Fluridil application stop hair follicle miniaturization? The single published fluridil trial (43 men, 9 months, double-blind and placebo-controlled) reported more hairs in the growth phase, but it never measured follicle diameter and has not been replicated — so whether daily use stops miniaturization is unproven, and community users describe stabilization rather than regrowth.

learn Follistatin

What is follistatin, and how does it influence hair follicle growth and regeneration? Follistatin blocks activin and related growth-inhibiting proteins, which in laboratory and animal work is described as keeping hair follicles in their growth phase; the only verifiable human evidence is a single small 2011 phase 1 injection trial, so follistatin remains experimental and is not an approved hair-loss treatment.

learn Stemoxydine

chemical from L'Oreal that encourages hair to enter growth phase

How does stemoxydine help stimulate new hair growth on the scalp? Stemoxydine stimulates new hair growth by promoting hair follicles to transition from the resting phase to the active growth phase.

learn Latanoprost

glaucoma medication with hair follicle stimulant effects

How does latanoprost work to make eyelashes and possibly scalp hair grow? Studies report that latanoprost, a prostaglandin analog, lengthens the anagen (growth) phase of hair follicles, which is the mechanism given for the eyelash thickening seen in glaucoma patients; on the scalp the evidence is one 16-man pilot study and animal work, so the effect there is unproven.

learn Exosomes

Microscopic delivery system that sends growth-promoting signals to hair follicles

learn Hair Multiplication

extract, clone, and reinsert your own hair cells

learn Alopecia Areata

autoimmune disorder causing patchy hair loss

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Clinics

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All 14 clinic results →

Experts

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SMP Specialist
Hairo Fallas
Newark, NJ, United States

Hairo Fallas