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Glossary Anagen Progression

phase of active hair growth in the hair cycle

Anagen progression refers to the phase in the hair growth cycle where hair actively grows. This phase can last anywhere from 2 to 7 years, during which the hair follicle is deeply embedded in the scalp and cells in the root of the hair are rapidly dividing. For professionals, understanding anagen progression is crucial for diagnosing and treating hair growth disorders, as disruptions in this phase can lead to conditions like alopecia.

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Research

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Histopathological Insights Into Hair Loss in Cronkhite-Canada Syndrome: Diffuse Anagen-Telogen Conversion Precedes Clinical Hair Loss Progression

research Histopathological insights into hair loss in Cronkhite-Canada syndrome: Diffuse anagen-telogen conversion precedes clinical hair loss progression

16 citations , May 2013 in “Australasian Journal of Dermatology”

In this study, detailed examinations of alopecic lesions in two female Cronkhite-Canada syndrome patients suggested hair regrowth might occur without systemic corticosteroids if not required for gastrointestinal treatment, and hair loss may begin with anagen-telogen transition.

research Effects of Imiquimod on Hair Follicle Stem Cells and Hair Cycle Progression

25 citations , July 2016 in “The journal of investigative dermatology/Journal of investigative dermatology”

This study found that applying topical imiquimod during mid and late telogen in mice activates hair follicle stem cells and influences immune cell infiltration, promoting hair cycle entry independently of Wnt signaling.

research 459 Estetrol prevents catagen progression in healthy and female pattern hair loss hair follicles ex vivo

November 2025 in “Journal of Investigative Dermatology”

Estetrol may help prevent hair loss and support hair growth in women.

research Intrinsic ROS Drive Hair Follicle Cycle Progression by Modulating DNA Damage and Repair and Subsequently Hair Follicle Apoptosis and Macrophage Polarization

20 citations , January 2022 in “Oxidative Medicine and Cellular Longevity”

This study found that intrinsic reactive oxygen species drive the hair follicle cycle progression through DNA damage and repair, apoptosis, and macrophage polarization, influencing hair loss and regeneration dynamics in mice.

Androgenetic Alopecia: Modeling Progression and Regrowth

research Androgenetic alopecia. Modelling progression and regrowth

4 citations , April 2016 in “Experimental Dermatology”

This commentary discusses the mechanisms of progression and potential regrowth in androgenetic alopecia, indicating that the initiation of anagen in kenogen follicles is more critical for hair density improvement than reversing follicle miniaturization.

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Community Join

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community Recent trials investigating mesenchymal stem cell derived exosomes demonstrate significant increases in anagen duration and hair shaft caliber by upregulating Wnt/beta-catenin pathways.

4 upvotes 3 weeks ago

Exosomes from mesenchymal stem cells can increase hair growth by enhancing anagen duration and hair shaft thickness through the Wnt/beta-catenin pathway. Phase 2 trials show improved hair counts over 24 weeks.

community Trying to understand severe shedding and progressive density loss after a successful hair transplant

8 upvotes 1 week ago

The user is experiencing severe shedding and progressive hair density loss after a successful hair transplant, despite using finasteride, minoxidil, microneedling, and scalp treatments. Suggestions include trying stronger treatments like oral dutasteride, topical RU58841, and higher doses of oral minoxidil.

community It's amazing how fast Pelage are going through the trials for PP405. From phase 1 to phase 3 in just 3 years is incredible. It has to be the fastest in history

in Chat 51 upvotes 4 months ago

PP405 is progressing rapidly through trials, with mixed opinions on its potential effectiveness. Current treatments like minoxidil and finasteride are still widely discussed, with some users reporting positive results from new formulations.

community Here are my scalp biopsy results? What does this mean?

5 upvotes 1 year ago

The user is experiencing progressive hair thinning despite using finasteride and dutasteride. A biopsy confirmed male pattern baldness, and minoxidil was suggested as an additional treatment.

community LLLT seems like it's at least a solid maintenance tool. Can also provide ok regrowth in AA and MPB. - Pubmed

17 upvotes 8 years ago

Low-Level Laser Therapy (LLLT) is seen as a safe and effective method for maintaining hair and promoting regrowth in androgenetic alopecia (AGA) and male pattern baldness (MPB), with devices like the HairMax LaserComb® and iRestore helmet being popular. Some users and professionals are skeptical about its long-term effectiveness and cost.

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