September 2024 in “Meditsinskiy sovet = Medical Council” As women age, hair follicles decrease in number and hair width tends to reduce.
May 2023 in “Animal Reproduction Update” High levels of cortisol in hair show long-term stress which can lower fertility in animals.
May 2017 in “Journal of microscopy and ultrastructure” Water quality affects mineral content in hair, and coconut oil can protect against damage.
Forensic hair analysis for drugs is now more reliable and accurate.
Hair follicles can be used to quickly assess drug effects in cancer treatment.
January 2011 in “Web journal anti-aging medicine/Anti-aging medicine” KGS1 tablets improved skin and hair health.
27 citations
,
January 2020 in “Experimental Dermatology” Immune cells affect hair growth and could lead to new hair loss treatments.
12 citations
,
January 1978 Friesian heifers take about 18 months to adapt to Kenya's climate, with hair changes not strongly linked to weight gain.
September 2025 in “International Journal of Ayurvedic Medicine” Hair medulla patterns vary by Prakruti type, affecting hair strength.
93 citations
,
February 2008 in “Atmospheric environment” Ozone reacts more with unwashed hair, producing compounds due to scalp oils, which could lower ozone exposure but increase exposure to reaction products.
29 citations
,
August 2017 in “Skin appendage disorders” IGF-1 may affect hair growth and loss, but more research is needed to confirm effective and safe treatments.
12 citations
,
May 2019 in “Stem cell reviews” Fetal-maternal stem cells in a mother's hair can help with tissue repair and regeneration long after childbirth.
9 citations
,
June 2020 in “Tissue Engineering and Regenerative Medicine” HHORSC exosomes and PL improve hair growth treatment outcomes.
8 citations
,
August 2020 in “Domestic Animal Endocrinology” Melatonin improved cashmere production in goats during the first cycle but had no lasting effects on the next cycle.
June 2026 in “Research Square” THBS4 helps hair grow by activating hair follicle stem cells.
January 2024 in “GeroScience” Using radiation to make mice's hair turn gray helps study and find ways to prevent or reverse hair graying.
417 citations
,
March 1991 in “American Journal of Psychiatry” Most adult chronic hair pullers are women who started in their early teens, often have other mental health issues, and may pull hair due to underlying psychiatric conditions.
256 citations
,
October 2013 in “Proceedings of the National Academy of Sciences of the United States of America” Growing human skin cells in a 3D environment can stimulate new hair growth.
242 citations
,
February 2016 in “Science” Hair loss and aging are caused by the breakdown of a key protein in hair stem cells.
193 citations
,
August 2005 in “Journal of Investigative Dermatology Symposium Proceedings” Hair loss common in Australia; men affected earlier, more often than Asians; women less concerned.
192 citations
,
March 2017 in “Cell host & microbe” Hair follicle development and microbes help regulatory T cells gather in newborn skin.
166 citations
,
August 2010 in “Proceedings of the National Academy of Sciences of the United States of America” Scientists found a new, less invasive way to study body clocks using hair cells, which shows shift workers' body clocks don't match their lifestyles.
161 citations
,
July 2003 in “ACM Transactions on Graphics” Researchers developed a new model for more realistic computer graphics rendering of hair by considering how light scatters on hair fibers.
130 citations
,
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.
127 citations
,
March 2016 in “PLoS ONE” Key genes and pathways crucial for hair follicle development in cashmere goats were identified, aiding fleece production improvement.
121 citations
,
January 1991 in “Acta dermato-venereologica” Terbinafine quickly builds up in skin and hair, staying effective for over 3 weeks.
97 citations
,
March 2002 in “Molecular and cellular biology” Mutant CDP/Cux protein causes hair defects and reduced male fertility in mice.
94 citations
,
May 2011 in “BJCP. British journal of clinical pharmacology/British journal of clinical pharmacology” Hair follicles greatly increase caffeine absorption through the skin shortly after it's applied.
91 citations
,
January 2009 in “International Journal of Trichology” Different hair evaluation methods have their own pros and cons, and using multiple methods together is best for accurate hair loss diagnosis and tracking.
Researchers developed a new model for more realistic computer graphics of hair by considering how light scatters on hair fibers.