7 citations
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September 2014 in “European Journal of Dermatology” Thicker hair grows faster; hair loss patients have slower growth.
April 2025 in “Journal of Investigative Dermatology” High LH levels cause hair loss by damaging and aging hair follicles.
6 citations
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November 2012 in “Hair transplant forum international” The Laxometer helps make hair transplants with many grafts safer.
March 2017 in “De Gruyter eBooks” The Leechbook shows how hair and sexual health were key to medieval masculinity and some remedies may still be useful.
September 2007 in “Hair transplant forum international” March 2007 in “Hair transplant forum international” January 2006 in “Hair transplant forum international” November 2005 in “Hair transplant forum international” 9 citations
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February 1966 in “British Journal of Dermatology” November 2002 in “International Society of Hair Restoration Surgery” 
18 citations
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April 2019 in “Archives of Dermatological Research” Lactoferrin helps mice grow hair by increasing cell growth and hair follicle development.
50 citations
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January 1986 2 citations
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January 2022 1 citations
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January 2020 50 citations
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February 2004 in “Genomics” A gene mutation causes lanceolate hair in rats by disrupting hair shaft integrity.
January 2004 in “Hair transplant forum international” 1 citations
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January 1988 in “Feminist studies” June 2023 in “Zenodo (CERN European Organization for Nuclear Research)” May 2003 in “Journal of clinical oncology” 
2 citations
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January 2017 in “PubMed” Hair casts are harmless but can be mistaken for head lice.
November 2003 in “Hair transplant forum international” 5 citations
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September 2011 in “Biochimica et Biophysica Acta (BBA) - Molecular Basis of Disease” Hairless protein helps control hair growth by regulating vitamin D receptor activity.
30 citations
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November 2005 in “The journal of investigative dermatology. Symposium proceedings/The Journal of investigative dermatology symposium proceedings” The lipid in human hair follicles acts as a barrier, similar to the skin's lipid layer.
January 2009 in “Hair transplant forum international” 
September 2020 in “Hair transplant forum international” The document's conclusion cannot be determined.
May 2020 in “Hair transplant forum international” The document's conclusion cannot be determined.
20 citations
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December 2010 in “Journal of Morphology” Lizard claws have hair-like keratins similar to those in mammals.
78 citations
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November 2005 in “Endocrinology” Hairless protein can block vitamin D activation in skin cells.