44 citations
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March 2004 in “Journal of Investigative Dermatology” The effects of estrogen on human hair growth are unclear and need more research.
41 citations
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May 2001 in “PubMed” Different thicknesses of hair strands can indicate the severity of hair thinning.
39 citations
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August 2021 in “JAAD International” COVID-19 patients often experience hair loss and scalp pain, which may be related to the severity of their infection and treatment drugs.
37 citations
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January 2010 in “Journal of Clinical Investigation” N-WASP is essential for normal hair growth in mice.
36 citations
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August 2009 in “PubMed” The review suggests seeing a dermatologist for scarring hair loss and using treatments like minoxidil or finasteride for common male and female pattern hair loss.
35 citations
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November 2020 in “Dermatologic Therapy” Severe COVID-19 may cause hair loss, and doctors recommend supplements and topical treatments to manage it.
35 citations
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January 2017 in “Journal of Dermatological Science” Stress can cause early aging in certain skin cells, leading to problems with hair growth.
35 citations
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September 1972 in “Journal of Biological Chemistry” Steroid hormone binding in rat skin varies with pH, heat, and hair cycle phases.
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.
30 citations
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March 2010 in “European Journal of Dermatology” Hair loss in elderly women is often caused by various factors, including hormonal changes after menopause.
28 citations
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August 2018 in “BMC genomics” DNA methylation changes are linked to hair growth cycles in goats.
28 citations
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June 1994 in “Journal of Dermatological Science” Proteolytic activity in mouse skin changes with hair cycle stages, peaking in early anagen.
26 citations
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December 2020 in “Genes” A combination of IGF-1 and EGF promotes hair growth in Angora rabbits.
25 citations
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December 2021 in “Journal of Medical Virology” COVID-19 can cause a type of hair loss that usually starts 74 days after infection, affecting mostly women, but most patients eventually recover.
24 citations
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January 2003 in “Journal of Investigative Dermatology” Blocking a specific receptor slows down hair loss in mice.
24 citations
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June 1999 in “Mechanisms of Development” Ornithine decarboxylase is crucial for hair growth and follicle development.
23 citations
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January 2018 in “BMC genomics” Vimentin is involved in regulating the hair growth cycle in Inner Mongolian Cashmere goats.
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.
21 citations
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May 2016 in “Experimental and Therapeutic Medicine” MMP-2 and MMP-9 help hair grow, while their inhibitors peak when hair growth slows.
20 citations
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January 2022 in “Oxidative Medicine and Cellular Longevity” Reactive oxygen species (ROS) influence hair growth by causing DNA damage, cell death, and changes in immune cells.
20 citations
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August 2007 in “Molecular therapy” Applying a DNA vaccine to skin with active hair growth boosts immune response and protection against anthrax in mice.
20 citations
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July 2005 in “Experimental dermatology” The fuzzy gene is crucial for controlling hair growth cycles.
20 citations
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January 1995 in “Cells tissues organs” Changing light periods synchronized wool growth cycles in sheep.
18 citations
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December 2009 in “Canadian Journal of Animal Science” The BMP2 gene is more active in the early growth phase of Cashmere goat hair and may affect hair regeneration and textile production.
16 citations
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October 2018 in “Biochemical and Biophysical Research Communications” Sildenafil, often used for erectile dysfunction, may help hair growth.
16 citations
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November 2005 in “Journal of Clinical Pathology” CD1d expression in scalp skin and hair follicles changes with the hair cycle and may help protect against microbes.
16 citations
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April 1998 in “Journal of Investigative Dermatology” ACTH promotes hair growth in mink, but α-MSH does not.
15 citations
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October 1999 in “British Journal of Dermatology” Collagen remodeling is more active during hair growth stages.
14 citations
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September 2021 in “Journal of Cosmetic Dermatology” Low vitamin D levels are linked to various types of hair loss, but more research is needed before using it as a treatment.
14 citations
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May 2020 in “Archiv für Tierzucht” Researchers identified genes that may affect hair growth in Cashmere goats.