72 citations,
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.
68 citations,
March 1965 in “The BMJ” Hormones and genetics affect hair growth and patterns, with some changes reversible and others not.
32 citations,
May 2018 in “Cell Cycle” Melatonin helps Cashmere goats grow more hair by affecting certain genes and cell pathways.
28 citations,
March 2019 in “Journal of Dermatological Science” The document concludes that while lab results for hair growth promotion are promising, human trials are needed and better testing methods should be developed.
22 citations,
February 2008 in “Journal of Dermatological Science” EPR spectroscopy showed that spontaneous hair growth results in thicker skin and less pigmented hair than depilation-induced growth.
20 citations,
February 2004 in “Veterinary dermatology” Dog hair grows back in about 14 weeks after being clipped for surgery, and the season doesn't really affect this growth rate.
16 citations,
October 2018 in “Biochemical and Biophysical Research Communications” Sildenafil, often used for erectile dysfunction, may help hair growth.
14 citations,
July 2021 in “Biomolecules” Centipeda minima extract helps hair grow by activating important growth signals and could be a promising hair loss treatment.
8 citations,
June 2019 in “Journal of Ginseng Research” Gintonin-enriched fraction promotes hair growth and could be a potential alopecia treatment.
3 citations,
January 2021 in “Applied sciences” Fermented red ginseng and a traditional herb mix improved hair growth in mice.
April 2024 in “bioRxiv (Cold Spring Harbor Laboratory)” A gene network led by RSL4 is crucial for early root hair growth in response to cold in Arabidopsis thaliana.
July 2023 in “bioRxiv (Cold Spring Harbor Laboratory)” Chitosan slows root hair growth and causes a buildup of callose at low concentrations, but at high concentrations, it only inhibits growth without callose buildup.
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.
210 citations,
July 1993 in “The journal of investigative dermatology/Journal of investigative dermatology” Hair color production in mice is closely linked to the hair growth phase and may also influence hair growth itself.
137 citations,
September 2005 in “Proceedings of the National Academy of Sciences of the United States of America” The HR protein helps hair grow by blocking a hair growth inhibitor, aiding in hair follicle regeneration.
127 citations,
December 2005 in “Experimental Dermatology” Stress can stop hair growth in mice, and treatments can reverse this effect.
109 citations,
July 1993 in “The journal of investigative dermatology/Journal of investigative dermatology” Hair color production is closely linked to the active growth phase of hair in mice and may also influence hair growth itself.
62 citations,
July 1993 in “Journal of Investigative Dermatology” Hair growth is influenced by interactions between skin layers, growth factors, and hormones, but the exact mechanisms are not fully understood.
48 citations,
June 2013 in “Journal of Dermatological Science” Valproic acid may help hair grow and could be a safe treatment for hair loss.
45 citations,
September 2012 in “Life Sciences” Aconiti Ciliare Tuber extract may help hair grow by activating a specific cell signaling pathway.
39 citations,
August 2008 in “Growth hormone & IGF research” Raspberry ketone may help grow hair and improve skin elasticity.
37 citations,
January 2002 in “British journal of dermatology/British journal of dermatology, Supplement” Apple extract called procyanidin B-2 was found to greatly increase hair growth.
36 citations,
December 2002 in “Experimental dermatology” Barley extract, specifically procyanidin B-3, can promote hair growth and counteract growth inhibition.
30 citations,
December 2014 in “Toxicological Research” Peppermint oil can effectively promote hair growth without being toxic.
26 citations,
October 2016 in “Biomolecules & Therapeutics” 3-Deoxysappanchalcone helps human hair cells grow and stimulates hair growth in mice by affecting certain cell signaling pathways.
22 citations,
July 2019 in “PLOS ONE” Skin lymphatic vessels are essential for hair growth.
20 citations,
August 2015 in “International Journal of Molecular Medicine” Human placental extract may help hair growth by affecting certain cell signals and could be more effective with minoxidil.
16 citations,
March 2017 in “Journal of inclusion phenomena and macrocyclic chemistry” Minoxidil mixed with 2-hydroxypropyl-β-cyclodextrin in water can improve hair growth more than minoxidil alone.
12 citations,
December 2009 in “Amino Acids” Putting α-methylspermidine on mouse skin can start hair growth.
10 citations,
May 2020 in “Dermatology Research and Practice” Proteoglycans are important for hair growth, and a specific treatment can help reduce hair loss.