December 1990 in “PubMed” Topical 17 alpha-propylmesterolone increases hair cell growth in androgenetic alopecia.
The human scalp has different types of pigment cells in hair follicles with varying abilities to produce pigment.
August 2023 in “International Journal of Molecular Sciences” The human scalp hair bulb contains different types of melanocytes with varying abilities to produce melanin.
130 citations
,
December 1998 in “The journal of investigative dermatology/Journal of investigative dermatology” Hair follicle melanocytes die during hair regression.
6 citations
,
November 2013 in “International Journal of Radiation Biology” Gamma-rays exposure during the resting phase of hair growth can damage hair regeneration and color in mice.
November 2013 in “Institutional Repositories DataBase (IRDB)” Gamma-ray exposure during hair rest phase harms hair growth and color in mice.
19 citations
,
February 1998 in “Cellular Immunology” Hair growth phase in mice weakens certain immune responses.
22 citations
,
July 1990 in “Acta Dermato Venereologica” High levels of testosterone and dihydrotestosterone inhibit hair cell growth, while high levels of estradiol promote it.
3 citations
,
April 2016 in “Food Science and Biotechnology” Oriental melon leaf extract may help hair grow and keep it in the growing phase longer.
April 2017 in “Journal of Investigative Dermatology” Scientists created a tiny, 3D model of a hair follicle that grows and acts like a real one.
12 citations
,
June 2009 in “Journal of Cosmetic Dermatology” Loose Anagen Hair syndrome occurs in dark-skinned children and often improves on its own.
4 citations
,
April 2018 in “The journal of pediatrics/The Journal of pediatrics” A 6-year-old girl's inability to grow her hair long was due to Loose Anagen Hair Syndrome, which causes hair to shed easily and may improve with age.
1 citations
,
July 2019 in “Case reports in dermatology” A Thai boy was diagnosed with a rare hair disorder causing hair thinning and shedding.
1 citations
,
August 1994 in “Journal of Cutaneous Pathology” Hair loss happens due to faster cell growth and fewer cells in affected follicles.
25 citations
,
October 1975 in “Journal of Cutaneous Pathology” Hair growth in alopecia areata is hindered due to impaired cell activity in the surrounding tissue.
8 citations
,
July 2007 in “International Journal of Dermatology” Using 5% topical minoxidil improved and normalized the hair growth in a girl with short anagen hair naevus.
109 citations
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July 1993 in “The journal of investigative dermatology/Journal of investigative dermatology” Hair color production is closely linked to the active growth phase of hair in mice and may also influence hair growth itself.
19 citations
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November 2001 in “Journal of Investigative Dermatology Symposium Proceedings” Human hair follicles can regenerate and recover after severe injury by going through a brief abnormal resting phase before growing again.
7 citations
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June 1967 in “Journal of Investigative Dermatology” Plucking hairs in a certain way can result in intact hair roots, not related to baldness.
3 citations
,
January 2005 in “Biological & Pharmaceutical Bulletin” The peptide GPIGS helps hair cells grow and speeds up hair regrowth in mice.
December 2010 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” New cells join the hair's dermal papilla during the growth phase, possibly affecting hair thickness.
July 2024 in “Journal of Investigative Dermatology” Ashwagandha nanoparticles help hair grow by increasing a growth factor.
14 citations
,
October 2020 in “Scientific reports” Hair greying is linked to reduced ATM protein in hair cells, which protects against stress and damage.
102 citations
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December 2017 in “The journal of investigative dermatology. Symposium proceedings/The Journal of investigative dermatology symposium proceedings” Restoring hair bulb immune privilege is crucial for managing alopecia areata.
134 citations
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September 2008 in “Lasers in surgery and medicine” Low fluence photoepilation temporarily removes hair by targeting the hair follicle's pigmented area without severe damage.
5 citations
,
November 2015 in “International Journal of Radiation Biology” Gamma-ray exposure can cause long-lasting damage to hair follicles, affecting hair structure and color.
January 2023 in “Figshare” Mouse skin and hair aging starts at 200 days, with changes in hair follicles and more white hairs as signs of aging.
165 citations
,
June 2007 in “European Journal of Cell Biology” Hair follicle stem cells are key for hair and skin regeneration, can be reprogrammed, and have potential therapeutic uses, but also carry a risk of cancer.
Testosterone and dihydrotestosterone can slow down the growth of certain hair follicle cells.
February 2010 in “Journal of The American Academy of Dermatology” Mimicking growth factors in a topical solution can prolong hair growth phase and reduce hair loss without side effects.