57 citations
,
November 1987 in “Pediatric Dermatology” Children's hair grows in different types from before birth through puberty, with growth rates and characteristics varying by age, sex, and race.
April 2019 in “Progress in Crystal Growth and Characterization of Materials” Hair grows like a crystal at a solid-liquid interface without cell division.
5 citations
,
July 2005 in “British journal of dermatology/British journal of dermatology, Supplement” A man grew hair on his penis, which is not common, and needed surgery to remove it.
1 citations
,
August 2015 in “PubMed” Human hair's strength comes from a honeycomb-like structure and macrofibrils.
45 citations
,
January 1986
Daily hair care may cause holes in hair fibers.
January 2014 in “Elsevier eBooks” The study concluded that genetic mutations affect human hair diseases and identified key genes and pathways involved in hair growth and cycling.
22 citations
,
July 2012 in “International Journal of Trichology” Miniaturized hairs stay connected to muscle in alopecia areata, allowing possible regrowth, but not in androgenetic alopecia.
3 citations
,
May 2006 in “Dermatologic Surgery” Most men's multi-hair follicles naturally stand perpendicular to a line from the top of their head, which is important for natural-looking hair transplants.
19 citations
,
March 1988 in “International Journal of Dermatology” Hair shaft dysplasias are abnormal hair conditions that can be inherited or acquired and may signal other health issues, with limited treatment options available.
January 2019 in “Elsevier eBooks” Different hair disorders have specific treatments and outcomes, with some resolving on their own and others requiring medication or emotional support.
44 citations
,
July 2005 in “Aesthetic Plastic Surgery” Hair transplantation successfully treated a woman's hair loss caused by a tight ponytail.
August 2018 in “Archives on veterinary science and technology” Hair loss in lab macaques is not always due to neglect and has multiple causes.
4 citations
,
January 2018 in “Advances in Experimental Medicine and Biology” The document concludes that hair follicles have a complex environment and our understanding of it is growing, but there are limitations when applying animal study findings to humans.
63 citations
,
October 2011 in “Archives of Dermatology” Isolated long hairs at the original hairline can help diagnose Frontal Fibrosing Alopecia.
August 2009 in “PHARMACY: Jurnal Farmasi Indonesia (Pharmaceutical Journal of Indonesia)” Noni fruit extract speeds up hair growth in rabbits.
3 citations
,
October 2017 in “Journal of Cosmetic Dermatology” Dr. Muhammad Ahmad created a hair classification system to help improve hair restoration surgery outcomes.
8 citations
,
July 2020 in “BMC genomics” The research found genes that change during cashmere goat hair growth and could help determine the best time to harvest cashmere.
4 citations
,
June 1990 in “PubMed” Hair protein differences help identify species and individuals in forensic science.
35 citations
,
September 2003 in “Archives of dermatology” Tiger tail bands in hair are caused by wavy hair fibers with melanin, unlike straight fibers in normal hair.
December 2024 in “Frontiers in Veterinary Science” Dorper sheep's wool shedding is linked to specific genes and pathways, which may help understand human hair growth.
1 citations
,
January 1997 in “Skin Pharmacology and Physiology” Premature infants have less elastic hair than full-term infants.
Hairlessness in mammals is caused by combined changes in genes and regulatory regions.
25 citations
,
August 2017 in “Frontiers in Zoology” Marine mammals lost many α-keratin genes, aiding their adaptation to aquatic life by becoming hairless.
August 2016 in “Journal of Investigative Dermatology” Human hair follicles have a scent receptor that can influence hair growth.
32 citations
,
January 1994 in “Skin Pharmacology and Physiology” Minoxidil helps hair growth by activating enzymes in hair follicles.
30 citations
,
January 2014 in “Dermatologic Clinics” Tight hairstyles, especially on chemically treated hair, can cause reversible hair loss if caught early but may become permanent if not addressed.
3 citations
,
June 2001 in “Scientific American”
The document concludes that activating hair roots is important for improving hair growth and preventing hair loss.