February 2026 in “Veterinary Dermatology” Coat-type differences in Pomeranians affect Alopecia X diagnosis and treatment.
1 citations
,
March 2005 in “International Journal of Cosmetic Science” Twisting hair weakens it, but strength can be recovered at low twist levels.
2 citations
,
September 2022 in “Frontiers in genetics” Different proteins are linked to the varying thickness of sheep and goat hair types.
1 citations
,
January 1997 in “Skin Pharmacology and Physiology” Premature infants have less elastic hair than full-term infants.
16 citations
,
April 2009 in “Dermatologic Surgery” The place where hair is transplanted can change its growth rate and length but not its thickness.
December 2025 in “British Journal of Dermatology” 1 citations
,
March 2017 in “Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego” Domestic cat hair varies in thickness and length, with guard hairs being longest and thickest, and all hair types mainly contain keratin.
February 2026 in “Journal of Cosmetic Dermatology” A new reliable scale improves accuracy in measuring hair density and treatment response.
Malnourished people have weaker hair that is easier to pluck.
January 2009 in “Chinese journal of Clinical Medicine”
July 2025 in “Journal of the American Academy of Dermatology” Hair diameter diversity helps assess hair loss, but its standard measure varies by individual and ethnicity.
January 2014 in “Journal of the Korean Society of Design Culture” The study confirmed that changes in hair structure in women with hair loss conditions matched what is taught in beauty college trichology courses.
117 citations
,
August 2005 in “Ultramicroscopy” Human hair's strength and flexibility vary by ethnicity, damage, and treatment.
November 2023 in “Journal of Dermatological Science” A new computer tool quickly measures hair thickness differences in people with common types of hair loss.
166 citations
,
August 2011 in “Dermatologic Surgery” Platelet-rich plasma with a new carrier significantly increases hair thickness without serious side effects.
1 citations
,
January 2018 in “Acta dermato-venereologica” A teenager's hair with alternating white and dark bands, known as Pili annulati, is a genetic condition that is usually harmless and often considered attractive.
March 2021 in “CRC Press eBooks” The document concludes that different patterns of hair thickness and scalp changes can help diagnose types of non-scarring hair loss.
January 2017 in “Archives of Aesthetic Plastic Surgery” Hair care products with placental growth factor can improve hair thickness and density in postpartum hair loss.
55 citations
,
February 2014 in “Journal of Structural Biology” Human hair has a complex, variable structure with a consistent matrix and double-twist pattern.
December 2000 in “日本組織細胞化学会総会プログラムおよび抄録集” 2 citations
,
January 2010 Tianzhu white yak hair varies in structure and density between fuzz and coarse hair.
April 2023 in “Experimental Dermatology” Human dermal papilla cells can increase hair thickness and number in pigs with just one injection.
1 citations
,
January 2017 in “Yonsei Medical Journal” Hair is thinner near the scalp in acute hair shedding conditions.
January 2016 in “프로그램북(구 초록집)” The thulium laser and PDRN injections effectively improved hair thickness in patients with pattern hair loss.
March 2014 in “CRC Press eBooks” Human head hair can grow very long and is thicker than most body hair.
July 2009 in “International Journal of Cosmetic Science” Japanese women's curved hair has an uneven internal structure and varied amino acid composition.
17 citations
,
October 1981 in “American Journal of Clinical Nutrition” Malnourished people have weaker hair that is easier to pluck.
January 2013 in “Wool textile journal” January 2025 in “International Journal of Dermatology” Afro-textured hair in indigenous South Africans has lower density and unique features, needing specific evaluation standards.
September 2002 in “대한피부과학회지” Koreans have lower hair density, larger hair diameter, and slower hair growth than Caucasians.