January 2022 in “Figshare” Melatonin affects when and how goat hair grows by changing gene activity at different stages.
May 2024 in “Cell proliferation” Melatonin helps hair grow by activating a specific signaling pathway.
48 citations
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July 1993 in “Archives of Dermatological Research” Merkel cells are abundant in facial vellus hair follicles, especially during the anagen phase.
1 citations
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April 2019 in “PubMed” The medulla in Asian scalp hair has a tubular structure that allows ions and large molecules to flow through it.
71 citations
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June 2005 in “Journal of Investigative Dermatology” PAD enzymes play a key role in hair growth and structure.
April 2018 in “The journal of investigative dermatology/Journal of investigative dermatology” Removing Lrig1-positive stem cells in mice causes temporary loss of sebaceous glands.
9 citations
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August 2013 in “Archives of Dermatological Research” A gene called BMAL1 plays a role in controlling hair growth.
April 2018 in “The journal of investigative dermatology/Journal of investigative dermatology” The model can effectively test gene functions and drug responses in human skin.
January 2002 in “HAL (Le Centre pour la Communication Scientifique Directe)” Melatonin affects fur growth timing in chinchillas.
September 2025 in “American Journal of Dermatopathology” PRAME is often present in Paget disease and could help in diagnosis, but more research is needed.
October 2025 in “Journal of the Endocrine Society” Rathke’s cleft cysts can rarely cause Cushing disease, and surgery can improve symptoms.
December 2018 in “Neuroradiology” MRI helps distinguish between pituitary adenomas and craniopharyngiomas, guides treatment for pediatric CNS tumors, and assesses rhinocerebral mucormycosis with a high mortality rate in transplanted patients.
205 citations
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March 2012 in “Science Translational Medicine” PGD2 stops hair growth and is higher in bald men with AGA.
19 citations
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October 2022 in “The Ocular Surface”
As people age, certain enzymes in scalp glands decrease, affecting hair health.
4 citations
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August 2017 in “International journal of molecular sciences” The conclusion is that Pigmented Epithelioid Melanocytoma can start from hair follicle stem cells or from a mole on the skin.
Testosterone in human pancreas cells boosts insulin production.
22 citations
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October 2019 in “International Journal of Nanomedicine” The nanoparticles improved hair growth and enlarged hair bulbs.
January 2022 in “Skin appendage disorders” Trichoscopy effectively visualizes scalp micropigmentation without invasive methods.
40 citations
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April 1999 in “Journal of Histochemistry & Cytochemistry” S100A3 protein is mainly found in specific parts of human hair cells.
26 citations
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December 2006 in “Endocrinology” A cream with a specific hormone blocker increases hair growth in mice.
9 citations
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August 2014 in “European journal of ophthalmology” PGF2α receptors in human eyelids are found in specific parts of hair follicles, explaining eyelash changes with glaucoma treatment.
63 citations
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July 2006 in “British Journal of Dermatology” Psoriasis causes changes in certain keratins and shrinks sebaceous glands in the scalp.
April 2024 in “Biomedicine & pharmacotherapy” Pilose antler extract helps hair grow in mice with a type of hair loss by speeding up the growth phase.
June 2026 in “Indian Dermatology Online Journal” A supernumerary nipple was correctly identified using dermoscopy, avoiding misdiagnosis.
8 citations
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January 1984 in “Veterinary Pathology” Toy poodles may develop harmless mineral deposits around hair follicles as they age.
September 1973 in “Primates”
April 2018 in “Journal of Investigative Dermatology” Researchers found that the Leptin receptor is a consistent marker for hair follicle dermal cells, which may help future hair research.
16 citations
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August 2000 in “Il Farmaco” Men have more tryptophan in their hair than women, and it increases with age and is higher in darker and grey or white hair.
June 2026 in “Journal of Investigative Dermatology” Aging weakens sweat glands due to reduced support from immune cells, but treatments may help restore function.