The inner root sheath in hair follicles plays a key role in hair growth and health.
July 2024 in “Biological and Pharmaceutical Bulletin” Licorice extract helps hair growth and may treat hair loss.
IRS-specific genes in Tan sheep hair follicles peak at birth and may affect wool crimp.
June 2022 in “Research Square (Research Square)” Nestin-expressing cells turn into a specific type of skin cell in hair follicles during development and in adults.
May 2022 in “Research Square (Research Square)” Nestin marks cells that can become a specific type of skin cell in hair follicles of both developing and adult mice.
April 2019 in “Journal of Investigative Dermatology” Maca root extract protects hair follicles and promotes hair growth.
September 2018 in “Cosmetics” Inositol and arginine solutions improve hair follicle health and turnover.
November 2016 in “Oncology Letters” Milia may come from the outer part of the hair follicle.
November 2012 in “International Journal of Data Science and Artificial Intelligence” Glycyrrhiza glabra root extract promotes faster and longer hair growth in female rats.
Testosterone and dihydrotestosterone can slow down the growth of certain hair follicle cells.
188 citations
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May 2009 in “Plant physiology” Researchers found 19 genes important for root hair growth in a plant called Arabidopsis.
58 citations
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June 1987 in “Archives of Dermatological Research” EGF and FGF boost hair cell growth, hydrocortisone slows it, and minoxidil doesn't affect it.
8 citations
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September 1995 in “Acta Dermato Venereologica” Calcipotriol treatment for scalp psoriasis does not cause hair loss.
66 citations
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December 2016 in “Frontiers in Plant Science” Some rice types grow better roots for phosphorus uptake, but not all do.
44 citations
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January 2023 in “New Phytologist” FER and TOR signaling help root hair growth in low temperature and low nitrate conditions.
37 citations
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November 2003 in “Veterinary pathology” Hair loss in mice starts with immune cells damaging hair roots before it becomes visible.
21 citations
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September 2021 in “New Phytologist” HB24 helps convert IBA to IAA, promoting root hair growth.
12 citations
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April 2015 in “BMC research notes” Root hairs in cereal crops can grow beyond the usual zone, and using Turface® clay helps study this.
2 citations
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July 2023 in “Agronomy” Melatonin helps wheat plants resist drought by improving their root and root hair growth.
October 2025 in “bioRxiv (Cold Spring Harbor Laboratory)” Root hair growth slows under force, confirming a model of cell wall mechanics.
2 citations
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January 1989 Researchers developed a method to grow skin-like tissue from hair cells.
107 citations
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May 1999 in “Archives of Dermatological Research” Basal cell carcinoma may start from parts of tiny hair follicles.
35 citations
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August 1987 in “In Vitro Cellular & Developmental Biology - Plant” The new device improves human hair follicle cell growth and differentiation.
18 citations
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June 1993 in “Archives of Dermatological Research” Human hair follicles can be used to create skin-like tissue for wound healing and drug testing.
14 citations
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April 2021 in “International journal of molecular sciences” Mesenchymal stem cells may help treat hair loss by improving hair cell growth and reducing inflammation.
11 citations
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May 2020 in “Frontiers in psychiatry” Child abuse is linked to higher BMI, but not because of hair cortisol or cortisone levels.
9 citations
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March 1987 in “British Journal of Dermatology” EGF and FGF can boost hair growth by speeding up cell growth.
6 citations
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June 2017 in “Asian journal of beauty & cosmetology” Rosa multiflora root extracts may help promote hair growth and have anti-aging benefits.
5 citations
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January 1989 Testosterone and dihydrotestosterone slow hair cell growth, while estradiol has no effect.
3 citations
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January 2007 in “Nishinihon hifuka/Nishi Nihon hifuka” Great Burnet extract may prevent hair loss by extending the hair growth phase.