22 citations
,
July 1990 in “Acta Dermato Venereologica” High levels of testosterone and dihydrotestosterone inhibit hair cell growth, while high levels of estradiol promote it.
10 citations
,
January 2014 in “Genetics and Molecular Research” Liaoning Cashmere goat hair follicles show synchronized growth patterns with lowest activity in May.
1 citations
,
September 2025 in “Frontiers in Veterinary Science” Ganxi goats' skin and hair adapt to heat and humidity, possibly aided by GSDMA protein.
January 2004 in “Enshou saisei” Follistatin is important for hair growth and could help treat hair loss.
210 citations
,
February 2008 in “Nature genetics” Mutations in the P2RY5 gene cause autosomal recessive woolly hair.
165 citations
,
June 2007 in “European Journal of Cell Biology” Hair follicle stem cells are key for hair and skin regeneration, can be reprogrammed, and have potential therapeutic uses, but also carry a risk of cancer.
100 citations
,
May 2006 in “American Journal Of Pathology” Matriptase is crucial for skin barrier, hair growth, and may contribute to skin cancer.
76 citations
,
August 2018 in “International Journal of Cosmetic Science” Dermal Papilla cells are a promising tool for evaluating hair growth treatments.
38 citations
,
June 2019 in “International Journal of Molecular Sciences” Tiny particles called extracellular vesicles could help with skin healing and hair growth, but more research is needed.
33 citations
,
May 2006 in “Journal of Investigative Dermatology” PTHrP and its receptor can control blood vessel growth and hair development in mouse skin.
18 citations
,
September 2003 in “The journal of investigative dermatology/Journal of investigative dermatology” VDUP1 is found in skin and hair follicles, interacts with sciellin, and may help regulate skin cell differentiation.
17 citations
,
November 2012 in “Journal of Investigative Dermatology” The document concludes that over 500 genes are linked to hair disorders and this knowledge is important for creating new treatments.
13 citations
,
December 2019 in “Nutrients” An apple-based supplement was found to stimulate hair protein production, which may help with hair growth.
8 citations
,
November 2022 in “International Journal of Cosmetic Science” Human hair varies widely and should be classified by curl type rather than race.
7 citations
,
July 2019 in “International Journal of Molecular Sciences” PGA-4HGF may help treat hair loss by activating hair growth pathways and extending the hair growth phase.
7 citations
,
January 2019 in “PeerJ” A protein called sFRP4 can slow down hair regrowth.
6 citations
,
June 2011 in “British Journal of Dermatology” People with alopecia areata have higher levels of RBP4 protein and antibodies against it.
November 2025 in “Scientific Reports” COVID-19 may cause hair loss by affecting hair follicles.
September 2023 in “Journal of microbiology and biotechnology” A type of collagen helps hair grow by boosting cell growth and activating a specific hair growth pathway.
January 2017 in “Jikken doubutsu ihou/Jikken doubutsu/Experimental animals/Jikken Dobutsu” Mice with a changed Hr gene lose and regrow hair due to changes in the gene's activity.
January 2006 in “The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology” Rubus coreanum may help hair growth but not through the tested mechanisms, and none of the herbal extracts help with acne.
14 citations
,
December 2020 in “Journal of Investigative Dermatology” Aging causes changes in the scalp that can affect hair growth and lead to older-looking hair in women.
2 citations
,
January 2000 in “Elsevier eBooks” The document explains how hair is studied in forensics to identify its source and its role in criminal investigations.
November 2024 in “Journal of Scientific Agriculture” Silk proteins are great for cosmetics because they protect and improve skin and hair while being eco-friendly.
Biotin boosts wool growth and follicle health in sheep.
50 citations
,
September 2011 in “Biochimica et Biophysica Acta (BBA) - Molecular and Cell Biology of Lipids” Maintaining the right amount of retinoic acid is crucial for healthy hair and skin.
15 citations
,
July 2016 in “Biochemical Journal” Wnt proteins from certain skin cells are crucial for normal hair growth and renewal.
13 citations
,
March 2013 in “International Journal of Cosmetic Science” AcSDKP may help prevent skin and hair aging and promote their growth.
11 citations
,
January 2018 in “Royal Society Open Science” Scientists found genes linked to the growth of high-quality brush hair in Chinese Haimen goats.
March 2010 in “Cosmetic Dermatology” Hair straightening methods have advanced to improve effectiveness and reduce damage, but still rely on heat and chemicals.