24 citations
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December 2014 in “International Journal of Molecular Medicine” In this study, researchers found that petroleum ether extract of Eclipta alba significantly stimulated follicular keratinocyte proliferation and reduced TGF-β1 expression in nude mice, suggesting potential use for certain types of alopecia.
July 2024 in “Journal of Investigative Dermatology” Versican in dermal papilla cells is crucial for healthy hair growth.
115 citations
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August 2008 in “The Journal of Clinical Endocrinology & Metabolism” In this study, T3 and T4 were found to directly influence human hair follicles in vitro, enhancing keratinocyte proliferation, prolonging the hair growth phase, and affecting pigmentation.
60 citations
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May 2014 in “British Journal of Dermatology” This study found that caffeine enhanced hair growth and keratinocyte proliferation in human hair follicles, with female follicles showing greater sensitivity than male ones.
18 citations
,
November 2014 in “Journal of Agricultural and Food Chemistry” This study found that ethanol-extracted propolis stimulated hair growth in mice by promoting the proliferation of hair keratinocytes.
30 citations
,
April 2017 in “European Journal of Cell Biology” This study observed that CIP/KIP proteins play a significant role in regulating cell cycle arrest and differentiation in human hair follicles, supporting hair growth and formation in the anagen phase.
8 citations
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March 2019 in “Journal of Biomedical Materials Research Part A” This laboratory study found that collagen matrices with high-sulfated hyaluronan may enhance the cultivation of human keratinocytes and melanocytes from hair follicles for epidermal graft development.
15 citations
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September 2012 in “PTR. Phytotherapy research/Phytotherapy research” In this study, topical application of ginsenosides Rb₁ and Rd in mice increased cell proliferation in hair follicles, suggesting they may help prevent hair loss by promoting growth through p63 induction.
January 2022 in “Biomedical Reports” This study suggests that inaudible sound at 30 kHz may promote hair growth and inhibit hair loss signals in human dermal papilla cells, indicating potential as a new treatment for androgenic alopecia.
17 citations
,
February 2018 in “Journal of Investigative Dermatology” This study found that the PPAR-γ modulator N-acetyl-GED may enhance mitochondrial function in human hair follicles, particularly in outer root sheath keratinocytes.
1 citations
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May 2022 in “International Journal of Cosmetic Science” This study reports that Edelweiss extract significantly prolonged the anagen phase and increased hair density, suggesting potential as an anti-hair loss treatment.
1 citations
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January 2019 in “Skin Pharmacology and Physiology” This study found that inhibiting mineralocorticoid receptor signaling in female human hair follicles may promote hair growth by extending the anagen phase and encouraging keratinocyte proliferation.
November 2025 in “Journal of Investigative Dermatology” NUL-5 may boost hair growth by improving hair follicle health and structure.
April 2023 in “The journal of investigative dermatology/Journal of investigative dermatology” This study found that the natural estrogen Estetrol (E4) may promote hair follicle growth and prevent miniaturization, suggesting its potential as a treatment for hair loss disorders.
November 2022 in “Journal of Investigative Dermatology” This study found that marine-derived collagen peptides slightly promoted hair matrix proliferation and prolonged hair growth phase in human hair follicles ex vivo, suggesting potential benefits for hair loss treatment.
This study suggests that bovine and fish-derived collagen peptides may help maintain or prolong the hair growth phase and balance hair follicle stem cell populations, potentially benefiting aging and hair loss conditions like androgenetic alopecia.
October 2021 in “Journal of Investigative Dermatology” In this study, researchers found that using a novel Leontopodium alpinum (Edelweiss) extract led to increased hair density and prolonged anagen phase in both ex vivo human hair follicles and a 5-month clinical trial, suggesting potential as an anti-hair loss treatment.
September 2019 in “Journal of Investigative Dermatology” This study found that apple stem cell extract may selectively influence hair follicle bulge stem cell biology without cytotoxic effects in an ex vivo human hair follicle organ culture.
December 2018 in “Journal of Medicinal and Aromatic Plant Sciences” This review discusses various plants being investigated for their potential in hair growth promotion and highlights the need for more research, reporting no new clinical results.
August 2006 in “Experimental dermatology” This study suggests that human scalp hair follicles express erythropoietin and its receptor, up-regulating receptor expression under hypoxic conditions, and may mimic another hypothalamus–pituitary axis equivalent involving the TRH-TSH system.
November 2022 in “Journal of Investigative Dermatology” In this study, a serum containing Silybum marianum extract, Manganese PCA, and Lespedeza capitata extract improved hair growth and prolonged the anagen phase in a human scalp skin model.
53 citations
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January 2009 in “Journal of Investigative Dermatology” In this study, UVB irradiation of organ-cultured human anagen hair follicles in vitro reduced hair elongation and increased cell death, affecting hair growth and regulatory processes.
26 citations
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October 2007 in “Experimental Dermatology” This study found that l-carnitine stimulated hair growth in vitro by promoting proliferation and reducing apoptosis in human scalp hair follicles, suggesting potential as a treatment for hair loss.
April 2023 in “The journal of investigative dermatology/Journal of investigative dermatology” This study provides ex vivo proof-of-principle that low-intensity ultrasound may protect human hair follicles from paclitaxel-induced damage, potentially reducing chemotherapy-related alopecia.
30 citations
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November 2018 in “EMBO Reports” This study found that the Ovol2-Zeb1 regulatory circuit is crucial for controlling directional migration and proliferation in epithelial cells, facilitating skin regeneration and repair in mice.
27 citations
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October 1998 in “Differentiation” Basonuclin helps identify and track hair follicle development and cycling in mice.
January 1998 in “Differentiation” Basonuclin is crucial for hair follicle development and cycling in mice.
20 citations
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February 2016 in “American Journal of Pathology” This study indicates that the OVOL1-OVOL2 axis may play a significant role in hair follicle differentiation and growth, potentially serving as therapeutic targets for hair disorders like alopecia and in the tumorigenesis of pilomatricoma.
September 2018 in “Central Asian journal of medical sciences (Print)” This study found that Urticadioica L ethanol extracts enhanced hair growth and reduced catagen transition in human hair follicles in an ex vivo organ culture model.
17 citations
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February 2015 in “International Journal of Molecular Sciences” This study found that keratinocyte stem/progenitor cell-conditioned medium significantly enhanced hair growth in mice and increased the proliferation of human hair follicle cells.