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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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    1. Comparison of Hair Follicle Density and Anagen:Telogen Ratio between Topical Minoxidil Alone and Its Combination with Platelet-Rich Plasma Exosomes in a Mice Model of Androgenetic Alopecia Malaysian Journal of Medicine and Health Sciences · 2026
    2. Amaranthus Extract Promotes Healthy Follicles and Anagen Hair Density-A Randomized Placebo-Controlled, Double-Blinded Study. PubMed · 2025
    3. Ephrin-A3 not only increases the density of hair follicles but also accelerates anagen development in neonatal mice Journal of Dermatological Science · 2008 · 15 citations
    4. Anagen hair follicles transplanted into mature human scars remodel fibrotic tissue npj regenerative medicine · 2023 · 6 citations
    5. Exposure to gamma-rays at the telogen phase of the hair cycle inhibits hair follicle regeneration at the anagen phase in mice International Journal of Radiation Biology · 2013 · 6 citations
    6. Exposure to gamma-rays at the telogen phase of the hair cycle inhibits hair follicle regeneration at the anagen phase in mice Institutional Repositories DataBase (IRDB) · 2013
    7. Exposure to gamma-rays at the telogen phase of the hair cycle inhibits hair follicle regeneration at the anagen phase in mice Institutional Repositories DataBase (IRDB) · 2013
    8. Anagen Hair Follicles Transplanted into Mature Human Scars Remodel Fibrotic Tissue SSRN Electronic Journal · 2021 · 1 citations
    9. A Novel, Drinkable Food Supplement Formulation Reduces Hair Shedding and Increases the Percentage of Anagen Scalp Hair Follicles in Females with Hair Loss Journal of Clinical Medicine · 2025
    10. ISID1373 - Expression of programmed cell death 1 inversely correlated with the density of CD8+ T cells infiltrating hair follicles in alopecia areata 2023
    11. 1373 Expression of programmed cell death 1 inversely correlated with the density of CD8+ T cells infiltrating hair follicles in alopecia areata Journal of Investigative Dermatology · 2023
    12. Growth and viability of Liaoning Cashmere goat hair follicles during the annual hair follicle cycle Genetics and Molecular Research · 2014 · 10 citations
    13. The effects of gamma rays on the regeneration of hair follicles are carried over to later hair cycles International Journal of Radiation Biology · 2015 · 5 citations
    14. Hair diameter diversity: a clinical sign reflecting the follicle miniaturization. PubMed · 2001 · 41 citations
    15. Enhancing hair follicle regeneration by nonablative fractional laser: Assessment of irradiation parameters and tissue response Lasers in Surgery and Medicine · 2015 · 16 citations
    16. 4 Hair Follicle Physiology and Mechanisms of Hair Disorders Hair Transplantation · 2022
    17. DNA Methylation Mediates lncRNA2919 Regulation of Hair Follicle Regeneration International Journal of Molecular Sciences · 2022
    18. Hair Density in African Americans Archives of Dermatology · 1999 · 129 citations
    19. Short anagen hair with persistent synchronized pattern of scalp hair growth Journal of The American Academy of Dermatology · 2003 · 16 citations
    20. Hair follicle characteristics as early marker of Type 2 Diabetes Medical Hypotheses · 2016 · 13 citations
    21. An extract of <i>Leontopodium alpinum</i> inhibits catagen development ex vivo and increases hair density in vivo International Journal of Cosmetic Science · 2022 · 1 citations
    22. Preliminary Effects of Hyperbaric Oxygen Therapy on Hair Follicle Characteristics in Healthy Subjects Bioengineering · 2026
    23. Preliminary Effects of Hyperbaric Oxygen Therapy on Hair Follicle Characteristics in Healthy Subjects Preprints.org · 2026
    24. Retinoic acid drives hair follicle stem cell activation via Wnt/β‐catenin signalling in androgenetic alopecia 2024
    25. Skin transcriptome reveals the intrinsic molecular mechanisms underlying hair follicle cycling in Cashmere goats under natural and shortened photoperiod conditions Scientific reports · 2017 · 24 citations
    26. Interest of Panax Ginseng and Albizia Julibrissin extracts to prevent age-related hair density reduction Journal of the American Academy of Dermatology · 2019
    27. Biology of the hair follicle and mechanisms of nonscarring and scarring alopecia Seminars in cutaneous medicine and surgery · 2015 · 10 citations
    28. UT-018 Accelerates Wound Repair and Hair Follicle Regeneration in Murine Models bioRxiv (Cold Spring Harbor Laboratory) · 2026 · 1 citations
    29. Overexpression of Nanog in amniotic fluid–derived mesenchymal stem cells accelerates dermal papilla cell activity and promotes hair follicle regeneration Experimental and Molecular Medicine · 2019 · 14 citations
    30. 15. Hair and Nails Medical & surgical dermatology · 2009