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    Glossary Terminal Hair Follicles

    structures producing thick, pigmented hair on scalp and body

    Terminal hair follicles are the structures in the skin that produce terminal hair, which is the thick, pigmented hair found on the scalp, face, armpits, and pubic area. Unlike vellus hair, which is fine and light, terminal hair is coarser and darker, and its growth is influenced by hormonal changes, particularly androgens.

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    Research 10 of 1000+

    1. Pattern hair loss: Assessment of microinflammation in miniaturized and terminal hair follicles through horizontal histologic sections Journal of The American Academy of Dermatology · 2020 · 11 citations
    2. Expression of the L-Fucose Moiety on Infrainfundibular Follicular Keratinocytes of Terminal Follicles, Its Decreased Expression on Vellus and Indeterminate Follicles of Androgenetic Alopecia, and Re-Expression in Drug-Induced Hair Regrowth Journal of Investigative Dermatology · 1992 · 9 citations
    3. 561 Vellus-to-terminal hair follicle reconversion does occur in male pattern balding in a new humanized mouse model of androgenetic alopecia and is promoted by minoxidil and PRP Journal of Investigative Dermatology · 2022
    4. Viable terminal scalp hair follicles constitute a necessary and sufficient biological end‐organ that conditions clinical efficacy of finasteride in males with male pattern hair loss without implying reversal of miniaturized follicles Skin Research and Technology · 2019 · 6 citations
    5. Characterisation of cell cycle arrest and terminal differentiation in a maximally proliferative human epithelial tissue: Lessons from the human hair follicle matrix European Journal of Cell Biology · 2017 · 30 citations
    6. Colocalization of Cystatin M/E and its Target Proteases Suggests a Role in Terminal Differentiation of Human Hair Follicle and Nail 2008 · 22 citations
    7. Expression of MK6a dominant-negative and C-terminal mutant transgenes in mice has distinct phenotypic consequences in the epidermis and hair follicle Differentiation · 1999 · 30 citations
    8. Maintenance of optimised hair growth from viable terminal scalp hair follicles at baseline with oral finasteride in male pattern hair loss and first evidence of a “drug dependency” and a post-finasteride “rebound effect”. Skin Research and Technology · 2019 · 4 citations
    9. 564 Vertex and Occipital Intermediate and Terminal Hair Follicles from Androgenetic Alopecia Patients are Differentially Affected by Testosterone Ex Vivo Journal of Investigative Dermatology · 2022
    10. 591 Chromatin architectural protein CTCF regulates terminal keratinocyte differentiation in the developing epidermis and hair follicles 2021
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    Community 10 of 59

    1. Confused why people are calling PP405 a cure...it never claimed to be able to undo miniaturization or revert vellus back to terminal hairs. It seems to be more of a growth stimulant like minoxidil. Reddit · 5 Jan 2025
    2. Minoxidil experiment on single hair follicle Reddit · 17 Jun 2025
    3. Found a slide summary for PP405 Reddit · 28 Mar 2026
    4. Finasteride only: Before vs 11 months Reddit · 31 Jul 2024
    5. Day 1 vs Day 168 (today) of defeating the norwood reaper Reddit · 9 Sept 2024
    6. Thought this was worth sharing. About 18 months. Reddit · 31 Aug 2024
    7. 0.5mg Dutasteride promotes more “regrowth” than 5mg oral Minoxidil Reddit · 3 Feb 2024
    8. Please explain this Minoxidil phenomena Reddit · 26 Oct 2023
    9. Using 5% Minoxidil for Frontal Vellus Hair to Terminal Community · 19 Oct 2025
    10. 1 year on oral minoxidil 5mg and finasteride 1 mg on alternate days. Started derma rolling 1 month back. Will the vellus hair in temple become terminal? Also seeing good hair growth and reduced hairfall after I started Biotin and other hair growth supplements Reddit · 7 May 2025
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    Learn 3 of 4

    1. Hair Multiplication extract, clone, and reinsert your own hair cells
    2. Low Level Laser Therapy Red-light devices, such as caps, combs and helmets, used on the scalp
    3. Follistatin Protein that blocks activin, a growth-regulating signal
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