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Glossary Anagen Hair Follicles

phase where hair actively grows

Anagen hair follicles, also known as growing hair follicles or active hair follicles, are in the phase of the hair growth cycle where the hair is actively growing. This phase can last anywhere from 2 to 7 years, during which the hair shaft is continuously produced by the follicle, resulting in longer hair. This is the most prolonged phase of the hair cycle and is crucial for determining the length of the hair.

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Research

5 / 1000+ results

Cells Within the Bulge Region of Mouse Hair Follicle Transiently Proliferate During Early Anagen: Heterogeneity and Functional Differences of Various Hair Cycles

research Cells within the bulge region of mouse hair follicle transiently proliferate during early anagen: heterogeneity and functional differences of various hair cycles

130 citations , January 1994 in “Differentiation”

In this study, researchers found that bulge cells in mouse hair follicles undergo transient proliferation during early anagen, indicating their role as follicular stem cells. However, another factor beyond dermal papilla proximity may be required to initiate a new anagen phase.

research Prostanoid receptors in anagen human hair follicles

39 citations , November 2007 in “Experimental dermatology”

This study found that prostaglandin receptors are widely expressed in hair follicles, suggesting a complex network of prostanoid pathways involved in hair growth control.

research Abnormal inner root sheath of the hair follicle in the loose anagen hair syndrome: An ultrastructural study

31 citations , December 2010 in “Journal of the American Academy of Dermatology”

This study reports that structural abnormalities in the inner root sheath of hair follicles may cause the hair shaft to be loosely attached in patients with loose anagen hair syndrome.

Ephrin-A3 Increases Hair Follicle Density and Accelerates Anagen Development in Neonatal Mice

research Ephrin-A3 not only increases the density of hair follicles but also accelerates anagen development in neonatal mice

15 citations , July 2008 in “Journal of Dermatological Science”

This study found that ephrin-A3 accelerates hair follicle development and increases hair follicle density in neonatal mice, suggesting its involvement in hair growth regulation.

research Structural optimization of pep7, a small peptide extracted from epimorphin, for effective induction of hair follicle anagen

9 citations , August 2005 in “Experimental Dermatology”

In this study, the researchers report that a modified epimorphin-derived peptide shows potential for hair follicle regeneration, especially when used with 1% minoxidil in mice.

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Community Join

5 / 371 results

community Anagen (@anagenxyz) claiming they've cracked scalp-only DHT blocking - thoughts?

15 upvotes 1 week ago

A company is developing a topical dutasteride that targets hair follicles without significantly affecting systemic DHT levels, with trials underway to measure its effectiveness. Users discuss the potential benefits and skepticism around the formulation compared to existing treatments.

community PP405 Won't Work Long Term: Hair Follicle Damage Due to Abuse of the ISR System

67 upvotes 11 months ago

PP405 may damage hair follicles if used long-term, suggesting cycling might be necessary. Combining it with finasteride could help maintain hair growth.

community Desensitize Follicle Sensitivity to DHT?

12 upvotes 3 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 PP405 Won’t Work: Follicle Is Miniaturized, Fibrosed, And Missing Key Support Cells

7 months ago

PP405 is ineffective for miniaturized, fibrosed hair follicles in androgenetic alopecia. AMP303 may activate hair follicle stem cells, but minoxidil and finasteride are still the main treatments.

community "Hair Follicle Stem Cells are quiescent 99% of the time and permanently reside in the hair follicle"

in Research/Science 1391 upvotes 1 year ago

Hair follicles are mostly dormant but can be reactivated with treatments like minoxidil, finasteride, and microneedling. A new drug, PP405, shows promise for hair regrowth but may not be available until 2027-2028.

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Learn

6 / 801 results

learn Caffeine

Does caffeine stimulate hair growth or only slow hair loss? Caffeine stimulates hair follicles in laboratory cultures, and one open-label trial in 210 men found a 0.2% caffeine topical non-inferior to minoxidil 5% on an anagen-ratio endpoint; there is no placebo-controlled evidence that it regrows hair, and none at all in alopecia areata or telogen effluvium.

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 Osteopontin

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

learn Ketoconazole

antifungal with some anti-androgenic benefits, often used as a shampoo

learn Fluridil

a topical anti-androgen with less systemic involvement

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Clinics

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