34 citations
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May 2013 in “Journal of the European Academy of Dermatology and Venereology” Hair growth slows and shedding increases after childbirth, but most women don't experience excessive hair loss.
4 citations
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August 2017 in “The Nurse Practitioner” Secondary amenorrhea has many causes and requires thorough evaluation to treat and restore menstrual cycles.
January 2002 in “Europe PMC (PubMed Central)” The model successfully simulates human hair growth and patterns, including hair loss types.
4 citations
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October 2021 in “bioRxiv (Cold Spring Harbor Laboratory)” G2 stem cells control calcium signaling for skin regeneration.
41 citations
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June 2010 in “Journal of Investigative Dermatology” New cells are added to the hair's dermal papilla during the active growth phase.
19 citations
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February 1998 in “Cellular Immunology” Hair growth phase in mice weakens certain immune responses.
3 citations
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June 2013 in “Genes & development” CaV1.2 helps activate hair follicle stem cells without calcium flux.
research Hair
January 1983 in “Elsevier eBooks” Hair grows from living roots, is made of dead keratin, and goes through growth, rest, and shedding stages.
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February 2008 in “Cell stem cell” NFATc1 is crucial for keeping hair follicle stem cells inactive.
6 citations
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April 1996 in “Journal of histochemistry and cytochemistry/The journal of histochemistry and cytochemistry” TGF-alpha is present in sheep and ferret skin and may affect hair growth without directly stimulating cell proliferation.
168 citations
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August 2009 in “EMBO molecular medicine” Epidermal stem cells are diverse and vary in activity, playing key roles in skin maintenance and repair.
25 citations
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February 1977 in “American Journal of Veterinary Research” Increasing daylight to 16 hours in winter can make mares ovulate and cycle earlier.
71 citations
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January 2015 in “Journal of molecular cell biology/Journal of Molecular Cell Biology” mTOR signaling helps activate hair stem cells by balancing out the suppression caused by BMP during hair growth.
December 2025 in “Brazilian Journal of Hair Health” The Spiral Model helps understand hair growth changes with age and identify hair problems early.
January 2016 in “eScholarship (California Digital Library)” HBCs in the olfactory epithelium can self-renew or differentiate into other cell types, with specific patterns during regeneration.
August 2020 in “Current psychopharmacology” Pregnancy and nursing increase certain brain activities in rats, but these changes disappear when the babies are taken away.
January 2023 in “Springer eBooks” Hair shedding that lasts over 6 months may need a closer look, but often just reassurance is enough.
36 citations
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October 2015 in “Cell reports” Gab1 protein is crucial for hair growth and stem cell renewal, and Mapk signaling helps maintain these processes.
1 citations
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January 1999 in “Proceedings of the British Society of Animal Science” Biotin helps maintain hair follicle growth by affecting cell death and survival signals.
January 2022 in “Figshare” Melatonin affects when and how goat hair follicle genes turn on and off during growth cycles.
April 2023 in “Journal of Investigative Dermatology” Hair growth is driven by cells that move and change like a conveyor belt.
335 citations
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March 2004 in “Development” Temporary activation of β-catenin can create new hair follicles, but ongoing activation is needed to keep hair follicle tumors.
November 2024 in “Aging Cell” Removing senescent cells can improve hair growth and regeneration.
130 citations
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December 1998 in “The journal of investigative dermatology/Journal of investigative dermatology” Hair follicle melanocytes die during hair regression.
31 citations
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August 2000 in “Journal of Investigative Dermatology” Stem cells are key for hair follicle recovery.
October 2023 in “Oncotarget” Apoptotic cells help cause hair follicle cell death during regression.
May 2024 in “International journal of medicine and psychology.” Transcranial electrical stimulation with bisphosphonates helps maintain bone collagen better than bisphosphonates alone.
2 citations
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September 1978 in “Anatomia Histologia Embryologia” Alkaline phosphatase activity in Beagle dog hair follicles is weakest in anagen and strongest in telogen.
November 2022 in “Journal of Investigative Dermatology” The research found specific genes that are more active in balding cells, which could be causing hair loss.
January 2022 in “Figshare” Melatonin affects when and how goat hair follicle genes turn on and off during growth cycles.