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Glossary Terminal Hair Growth

development of thick, pigmented hairs replacing finer vellus hairs

Terminal hair growth refers to the development of thick, pigmented hairs that replace the finer, lighter vellus hairs during puberty or in response to hormonal changes. These mature hairs are typically found on the scalp, face, armpits, and pubic area, and are influenced by androgens, particularly testosterone.

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Research

5 / 1000+ results

research Hair regrowth in male and female pattern hair loss does not involve the conversion of vellus hair to terminal hair

14 citations , January 2016 in “Experimental Dermatology”

This analysis concluded that hair regrowth in male and female pattern hair loss treatments did not involve converting vellus hairs into terminal hairs, suggesting a reactivation of dormant non-vellus follicles instead.

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

research 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

9 citations , January 1992 in “Journal of Investigative Dermatology”

This study found distinct differences in UEA I glycoprotein binding on follicular keratinocytes between anagen and telogen hair follicles, with staining associated with follicle length and regrowth.

Evidence from a Humanized Mouse Model of Androgenetic Alopecia That Platelet-Rich Plasma Stimulates Hair Regrowth, Hair Shaft Diameter, and Vellus-to-Terminal Hair Reconversion In Vivo

research Evidence from a humanized mouse model of androgenetic alopecia that platelet‐rich plasma stimulates hair regrowth, hair shaft diameter and vellus‐to‐terminal hair reconversion in vivo

March 2021 in “British Journal of Dermatology”

This study using a humanized mouse model of androgenetic alopecia suggests that platelet-rich plasma may promote hair regrowth and improve hair characteristics in vivo.

Advancing Hair Regrowth Assessment: Development and Standardization of Methods for Evaluating New Hair Growth, Hair Keratin Levels, and Scalp Health in Androgenetic Alopecia Patients

research Advancing Hair Regrowth Assessment: Development and Standardization of Methods for Evaluating New Hair Growth, Hair Keratin Levels, and Scalp Health in Androgenetic Alopecia Patients

February 2025 in “Cureus”

This study focused on developing and validating standardized methods to reliably assess hair growth and scalp health in androgenetic alopecia, finding significant differences in hair parameters such as vellus and terminal hair counts, density, and thickness between affected and standardized areas.

research Hair regrowth following a Wnt- and follistatin containing treatment: safety and efficacy in a first-in-man phase 1 clinical trial.

16 citations , November 2011 in “PubMed”

This study found that a single intradermal injection of Hair Stimulating Complex significantly improved hair growth in men with androgenetic alopecia compared to placebo.

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Community Join

5 / 535 results

community 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

in Is this regrowth? 12 upvotes 1 year ago

The conversation discusses hair regrowth treatments, including oral minoxidil 5mg and finasteride 1mg on alternate days, along with derma rolling, biotin, and other supplements. The user reports good hair growth and reduced hair fall, with no side effects from oral minoxidil except increased body hair.

community 15 months topical 5% min and 0.5 dut. Is this also regrowth? Or could these grow into terminal hairs at some point?

4 upvotes 2 weeks ago

The user has been using topical 5% minoxidil and 0.5 mg dutasteride for 15 months, noticing stronger hair and some new growth. They have experienced hair loss for 10 years, underwent two hair transplants, and are seeing density improvements, particularly in the frontal scalp.

community Vellus terminal microscope study

5 upvotes 1 month ago

The conversation discusses hair regrowth progress using Minoxidil, finasteride, and RU58841. It highlights the transformation of vellus hairs into terminal hairs in a Norwood 6 frontal area.

community Oral min and ru 🙏let’s hope these go terminal

in Is this regrowth? 1 year ago

The conversation discusses hair regrowth using oral minoxidil and RU58841, with visible baby hairs appearing after two months. One user questions the choice of RU58841 over finasteride.

community Terminal hairs growing in, but derm still says I’m going to go bald in the years to come??

in Chat 5 upvotes 1 year ago

A 30-year-old woman with a history of anemia and low vitamin D experienced hair shedding, which improved after addressing nutrient deficiencies. Despite regrowth of terminal hairs, her dermatologist recommended treatments like minoxidil and spironolactone to prevent future bald spots, but she is cautious due to family history of hormone-related cancers.

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Learn

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learn Osteopontin

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

learn Overview

learn Thymosin Beta 4

learn Clascoterone

How long does it take for clascoterone to show results on hair growth? Clascoterone is not approved for hair loss; it is investigational. In the trials reported so far, application was twice daily and increases in terminal hair count were reported at around 6 months, with more sustained change reported between 6 and 12 months.

learn Hair Transplant

Will my hair grow back after a hair transplant? Yes, transplanted hair typically grows back, but results vary by individual.

learn Scalp Micropigmentation

When will I see new hair growth after scalp micropigmentation? Providers describe scalp micropigmentation as a cosmetic tattoo that does not regrow hair, so there is no regrowth timeline to wait for. The 3-to-6-month and 9-to-12-month milestones often quoted alongside it belong to hair transplant surgery, not to SMP.

learn KY19382

How does KY19382 actually stimulate dormant hair follicles to grow again? KY19382 stimulates dormant hair follicles by reactivating the Wnt/β-catenin signaling pathway.

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 Follistatin

glycoprotein that inhibits TGF-β and promotes hair growth by antagonizing activin

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Clinics

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