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Glossary Anagen Entry

phase when hair follicles start active growth

Anagen Entry refers to the phase in the hair growth cycle when hair follicles transition from a resting state (telogen) to an active growth phase (anagen). During this period, cells in the hair bulb rapidly divide, leading to the formation of new hair shafts. This phase is crucial for hair regeneration and overall hair health.

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Research

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research Visible red light enhances physiological anagen entry in vivo and has direct and indirect stimulative effects in vitro

35 citations , December 2014 in “Lasers in surgery and medicine”

This study found that red light accelerated the transition from the resting to growth phase in hair follicles faster than green and blue light in mice, suggesting it may stimulate hair growth.

research Mammalian target of rapamycin complex 1 (mTORC1) may modulate the timing of anagen entry in mouse hair follicles

28 citations , November 2012 in “Experimental dermatology”

This study suggests that mTORC1 may play a role in regulating the timing of hair growth cycle phases, particularly the initiation of the anagen phase.

Hair Regenerative Mechanisms of Red Ginseng Oil and Its Major Components in the Testosterone-Induced Delay of Anagen Entry in C57BL/6 Mice

research Hair Regenerative Mechanisms of Red Ginseng Oil and Its Major Components in the Testosterone-Induced Delay of Anagen Entry in C57BL/6 Mice

33 citations , September 2017 in “Molecules”

This study found that red ginseng oil and its major components improved hair regrowth in testosterone-treated mice by promoting an earlier anagen phase and altering related gene expressions.

The Effect of JAK Inhibitor on Survival, Anagen Re-Entry, and Hair Follicle Immune Privilege Restoration in Human Dermal Papilla Cells

research The Effect of JAK Inhibitor on the Survival, Anagen Re-Entry, and Hair Follicle Immune Privilege Restoration in Human Dermal Papilla Cells

16 citations , July 2020 in “International Journal of Molecular Sciences”

This study found that ruxolitinib modulated inflammatory changes and stimulated growth factor signals by blocking the JAK-STAT pathway in an in vitro model of alopecia areata.

Atractylodes Macrocephala Koidz. Stimulates Dermal Papilla Cells to Promote Anagen Entry Associated with GSK3β/β-Catenin Signaling

research Atractylodes macrocephala Koidz. Stimulates Dermal Papilla Cells to Promote Anagen Entry Associated with GSK3β/β-Catenin Signaling

August 2026 in “International Journal of Molecular Sciences”

This study found that Atractylodes macrocephala Koidz. extract promotes anagen entry and hair regrowth by enhancing dermal papilla cell activity and supporting hair cycle progression in a mouse model.

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Clinics

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Community Join

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community Tazarotene shows strong standalone hair regrowth potential, not just a Minoxidil enhancer. Backed by VEGF, HF regeneration, and angiogenesis pathways. Here’s why.

135 upvotes 1 year ago

Tazarotene shows potential as a standalone treatment for hair regrowth by stimulating new hair follicle formation and promoting angiogenesis, similar to microneedling effects. It can be used topically without minoxidil, but users should start with a low concentration to avoid irritation.

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.

community Amplifica: Hope or Cope? A Review of Their Pipeline

9 upvotes 1 month ago

Amplifica's AMP-303 showed a modest increase in hair growth, but results were inconsistent and potentially misleading. Hyaluronic acid and osteopontin are being explored for hair growth, with varying effects on different hair types and conditions.

community Everything you ever wanted to know about Pelage Pharma's PP405: how it works and what to expect

126 upvotes 3 months ago

PP405 may encourage earlier hair growth and slightly increase visible hair count but does not reverse hair follicle miniaturization in male pattern baldness. It does not address damage to the dermal papilla or broken Wnt signaling.

community Bruteforcing alopecia or the new advent of science progress

22 upvotes 1 year ago

Combining therapies like scyllo-inositol, alpha-ketoglutarate, and autophagy-inducing supplements may enhance hair growth and prevent hair loss. Reporting individual results can accelerate progress in hair loss treatments.

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Learn

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learn Rapamycin

mTOR regulator and immunosuppressant used more recently for anti-aging and hair regrowth

learn Osteopontin

signaling protein that, when suppressed, may grow hair by reducing inflammation and stem cell loss

learn Thymosin Beta 4

learn Stem Cell Factor

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Experts

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