Search

for
Search:

Glossary Hair Bulb

rounded base of the hair follicle where growth starts

The hair bulb is the rounded, bulbous structure at the base of the hair follicle, located in the dermis layer of the skin. It is the site where hair growth begins, containing actively dividing cells that produce the hair shaft and the inner root sheath. The hair bulb also houses the dermal papilla, which supplies nutrients and signals necessary for hair growth.

Related Terms

Research

5 / 1000+ results

Effects of Epidermal Growth Factor, Fibroblast Growth Factor, Minoxidil, and Hydrocortisone on Growth Kinetics in Human Hair Bulb Papilla Cells and Root Sheath Fibroblasts Cultured In Vitro

research Effects of epidermal growth factor, fibroblast growth factor, minoxidil and hydrocortisone on growth kinetics in human hair bulb papilla cells and root sheath fibroblasts cultured in vitro

58 citations , June 1987 in “Archives of Dermatological Research”

This study found that epidermal and fibroblast growth factors increased proliferation of human hair bulb papilla cells and root sheath fibroblasts in vitro, while hydrocortisone decreased it and minoxidil had no effect.

research Premature Graying as a Consequence of Compromised Antioxidant Activity in Hair Bulb Melanocytes and Their Precursors

46 citations , April 2014 in “PLOS ONE”

This study found that compromised antioxidant activity in gray hair follicles affects both mature melanocytes and their immature precursors, linked to down-regulation of melanogenesis-related genes.

research Cellular Activity in the Dermis Surrounding the Hair Bulb in Alopecia Areata

25 citations , October 1975 in “Journal of Cutaneous Pathology”

This study found that in alopecia areata, hair bulbs are blocked in an early growth stage due to impaired metabolic function in the surrounding connective tissue, hindering hair growth.

Poly(γ-Glutamic Acid)/Chitosan Hydrogel Nanoparticles for Effective Preservation and Delivery of Fermented Herbal Extract for Enlarging Hair Bulb and Enhancing Hair Growth

research Poly(γ-Glutamic Acid)/Chitosan Hydrogel Nanoparticles For Effective Preservation And Delivery Of Fermented Herbal Extract For Enlarging Hair Bulb And Enhancing Hair Growth

22 citations , October 2019 in “International Journal of Nanomedicine”

This study suggests that the hydrogel nanoparticle formulation of hair growth-promoting compounds may enhance hair follicle penetration and induce hair growth in tested models, demonstrating its potential as a hair growth treatment.

research In vitro effects of testosterone, dihydrotestosterone and estradiol on cell growth of human hair bulb papilla cells and hair root sheath fibroblasts.

22 citations , July 1990 in “Acta Dermato Venereologica”

In this study, high concentrations of dihydrotestosterone and testosterone reduced the growth of human hair follicle cells in vitro, while high estradiol levels increased their growth.

View more "hair bulb" in research →

Community Join

5 / 1000+ results

community Losing hair without the white bulb, Tressless GPT's Response. Do you guys agree?

4 upvotes 1 year ago

Hair loss without a white bulb may indicate mechanical damage, anagen effluvium, alopecia areata, or traction alopecia. Seeking a specialist is recommended, but access can be difficult in smaller areas.

community Read about a recent study on the effects of Agerarin on ex-vivo hair bulbs and...

4 upvotes 3 months ago

The user started using Agerin cream on their scalp and noticed some hair growth, despite not applying it consistently. They also use Minoxidil, RU58841, dutasteride, and finasteride, and have seborrheic dermatitis.

community GFM Gel - High concentration topical gel of Mimicking Growth Factors (GFm), a complex of polypeptides that mimic the action of endogenous growth factors and promote physiological hair regrowth. Helps strengthen the hair bulb and redensify the hair.

6 upvotes 1 year ago

The conversation discusses using GFM Gel, a topical gel with polypeptides that mimic growth factors to promote hair regrowth and strengthen hair. It also mentions treatments like Minoxidil, finasteride, and RU58841 for hair loss.

community Hair loss research focused on chemistry for decades because we misunderstood the mechanics of growth.

51 upvotes 7 months ago

Hair growth relies on mechanical forces, not just chemicals, with tissue acting like a motor. Minoxidil and finasteride help, but maintaining tissue elasticity and addressing mechanical issues are essential.