107 citations
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September 2002 in “Journal of Investigative Dermatology” Researchers found that hair shedding happens mostly when new hair is growing and involves a unique process.
90 citations
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October 1996 in “Dermatologic Clinics” Growth factors are crucial for hair development and could help treat hair diseases.
67 citations
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July 1985 in “British journal of dermatology/British journal of dermatology, Supplement” Men's thigh hair grows longer and has a longer growth cycle than women's, but arm hair growth is similar between genders.
57 citations
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April 2002 in “The journal of investigative dermatology/Journal of investigative dermatology” Vitamin D receptor is crucial for starting hair growth after birth.
38 citations
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December 2011 in “British Journal of Dermatology” Menopause-related hormonal changes affect hair but are not the only cause of hair changes in middle-aged women.
31 citations
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April 2007 in “Experimental Dermatology” Stress in mice delays hair growth and treatments blocking substance P can partly reverse this effect.
30 citations
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April 2017 in “European Journal of Cell Biology” CIP/KIP proteins help stop cell division and support hair growth.
27 citations
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January 2020 in “Experimental Dermatology” Immune cells affect hair growth and could lead to new hair loss treatments.
23 citations
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January 2002 in “Journal of Cutaneous Medicine and Surgery” Finasteride helps hair growth by decreasing cell death in hair follicles.
22 citations
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February 2002 in “Journal of theoretical biology” The model showed that randomness accurately describes individual hair growth cycles and that synchronization can cause large fluctuations not seen in humans.
18 citations
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October 2014 in “Experimental Biology and Medicine” Eating vitamin A affects hair growth and health by changing cell signals in mice.
11 citations
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October 1994 in “The Journal of Clinical Endocrinology and Metabolism” Finasteride increases hair growth, prolongs hair cycle, and lowers dihydrotestosterone levels.
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.
3 citations
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June 2006 in “Expert Review of Dermatology” The document concludes that hair loss is complex, affects many people, has limited treatments, and requires more research on its causes and psychological impact.
3 citations
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June 2017 in “International Journal of Radiation Biology” Gamma rays did not change hair follicle density but increased white and hypopigmented hairs in mice.
April 2017 in “Journal of Investigative Dermatology” The hair follicle dermal sheath is essential for hair shedding and needs to communicate with the outer root sheath for normal hair growth cycles.
January 2015 in “Journal of clinical & experimental dermatology research” A protein combining parathyroid hormone and collagen helped hair regrow in mice with a hair loss condition.
May 2020 in “Research Square (Research Square)” Researchers found four key stages of cell development that are important for hair growth and shedding in cashmere goats.
October 2023 in “Clinical medicine and medical research” Thyroid function may influence hair loss after COVID-19.
40 citations
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March 1982 in “British Journal of Dermatology” Young women with diffuse hair loss may have low SHBG levels, which could lead to more active testosterone and contribute to their hair loss.
130 citations
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January 1994 in “Differentiation” Mouse hair follicle cells briefly grow during the early hair growth phase, showing that these cells are important for starting the hair cycle.
116 citations
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May 2013 in “Proceedings of the National Academy of Sciences of the United States of America” Hair grows faster in the morning and is more vulnerable to damage from radiation due to the internal clock in hair follicle cells.
40 citations
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December 2011 in “British Journal of Dermatology” Women's hair generally gets thinner and less dense starting in their mid-thirties, with hair loss becoming more common as they age due to both genetics and environment.
2 citations
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October 2010 in “Journal of dermatological treatment” External treatments can change hair growth patterns in nude mice.
120 citations
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November 2014 in “Biological Reviews” The telogen phase of hair growth is active and important for preparing hair follicles for regeneration, not just a resting stage.
73 citations
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June 2001 in “Endocrinology” Prolactin affects when mice shed and grow hair.
72 citations
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February 2011 in “American Journal of Biological Anthropology” The conclusion is that recognizing hair growth cycles can improve the precision of dietary and health assessments from hair analysis.
30 citations
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October 2021 in “Scientific Reports” Inhibiting glycogen metabolism can promote hair growth.
26 citations
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December 2006 in “Endocrinology” A cream with a specific hormone blocker increases hair growth in mice.
21 citations
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January 2002 in “Journal of Cutaneous Medicine and Surgery” Finasteride affects hair growth by changing caspase and XIAP levels, potentially treating hair diseases.