November 2022 in “Journal of the Endocrine Society” A rare ovarian tumor caused high testosterone and excess hair in a woman, which was resolved after tumor removal.
8 citations
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June 2022 in “Scientific Reports” LGR5 is a common marker of hair follicle stem cells in different animals and is important for hair growth and regeneration.
April 2026 in “Brazilian Journal of Hair Health” Perifollicular fibrosis hinders hair regrowth in androgenetic alopecia, and new treatments targeting fibrosis are needed.
33 citations
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January 1997 in “Journal of Investigative Dermatology”
15 citations
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June 2019 in “eLife” Activin A and follistatin control when hair cells develop in mouse ears.
4 citations
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January 2019 in “Journal of cutaneous pathology” The mTOR pathway may be involved in the development of hair follicle tumors, with higher activity in malignant tumors.
November 2021 in “Authorea (Authorea)” PRP treatments and hair transplantation may be linked to the progression of pseudolymphoma to lymphoma.
32 citations
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April 2017 in “Scientific Reports” Platelet-rich plasma can help grow more mouse hair follicles, but it doesn't work for human hair follicles yet.
December 1990 in “PubMed” Different glycoconjugates are present in the outer and inner root sheaths of human hair follicles.
55 citations
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September 2003 in “Experimental Dermatology” PDGF signaling may play a role in hair growth cycle regulation.
6 citations
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January 2013 in “Experimental dermatology” Bimatoprost increases hair growth in mice without breaking down into other substances.
1 citations
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January 2015 in “Actas dermo-sifiliográficas/Actas dermo-sifiliográficas” Latanoprost eye drops caused excessive cheek hair growth and eyelash whitening in a woman.
9 citations
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November 1980 in “Geburtshilfe und Frauenheilkunde” Fenoterol treatment causes increased hair growth due to higher metabolism in hair follicles, not hormones.
2 citations
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February 2025 in “Journal of Investigative Dermatology” Progenitor cells randomly decide their roles to maintain hair follicle growth.
February 2024 in “IntechOpen eBooks” Myo-inositol-based treatments greatly improve pregnancy chances for women with PCOS.
4 citations
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May 1958 in “Journal of Investigative Dermatology” August 2023 in “Stem cell reviews and reports”
13 citations
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September 2019 in “EBioMedicine” sPLA2-IIA increases growth in hair follicle stem cells and cancer cells, suggesting it could be targeted for hair growth and cancer treatment.
1 citations
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November 2024 in “World Journal of Biology Pharmacy and Health Sciences” Women with PCOS have different hormone levels compared to those without PCOS.
2 citations
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July 2020 in “Giornale italiano di dermatologia e venereologia” A woman with frontal fibrosing alopecia experienced unusual hair growth after using a specific topical lotion.
November 2025 in “International Society of Hair Restoration Surgery” Immediate post-operative folliculitis is a reaction to surgery, not an infection.
September 2022 in “Journal of Ayub Medical College Abbottabad” Steroid injections are more effective than platelet rich plasma for treating patchy hair loss.
14 citations
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January 2019 in “Journal of Natural Medicines” Chaga mushrooms contain compounds that may promote hair growth better than common treatments.
December 1990 in “PubMed” Topical 17 alpha-propylmesterolone increases hair cell growth in androgenetic alopecia.
118 citations
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January 1992 in “Experientia” 58 citations
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April 1993 in “Developmental Biology” bFGF delays hair growth in mice.
26 citations
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April 2009 in “Australasian Journal of Dermatology” Spironolactone successfully treated hair loss in a 9-year-old girl.
17 citations
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October 2006 in “Molecular and Cellular Endocrinology” The L457(3.43)R mutation in the human lutropin receptor causes increased activity and hormone insensitivity, leading to precocious puberty.
September 2019 in “Journal of Investigative Dermatology” EGFR and MEK inhibitors reduce PD-L1 in hair follicles, possibly causing inflammation.
179 citations
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December 2004 in “Journal of The American Academy of Dermatology” Some postmenopausal women with frontal fibrosing alopecia stopped losing hair with finasteride treatment, hinting at a possible hormonal cause.