March 2018 in “Journal of Experimental Biology” Hair curliness is caused by the arrangement and length of two different cell types.
March 2026 in “Journal of the mechanical behavior of biomedical materials/Journal of mechanical behavior of biomedical materials” Hair cuticles remain stable and resilient under stress due to strong protein content and crosslinking.
July 1995 in “Journal of Dermatological Science” 11 citations
,
May 2016 in “PubMed” New imaging and testing methods can effectively assess hair shape changes and damage.
22 citations
,
May 2021 in “Nature Communications” Tissue stiffness affects hair follicle regeneration, and Twist1 is a key regulator.
1 citations
,
July 1935 in “Nature” Animal hair can curl tightly on its own, especially in foxes, due to changes in keratin.
June 2023 in “Facial Plastic Surgery Clinics of North America” Hair transplantation is important for transgender patients to enhance their masculine or feminine appearance.
19 citations
,
October 1985 in “British Journal of Dermatology” The document concludes that unruly hair can be congenital or acquired, often lacks specific treatments, and can be managed with oils and short hairstyles.
January 2023 in “Operative Techniques in Otolaryngology-Head and Neck Surgery” Hair transplants help transgender patients look more like their gender identity, with different procedures for trans women and men.
January 2016 in “Belarusian State Pedagogical University repository (Belarusian State Pedagogical University)” A 6-group geometric classification of human scalp hair is more reliable and objective for testing than an 8-group system.
13 citations
,
March 2012 in “The Journal of Dermatology” Hair transplant surgery can rebuild muscle and nerve connections, allowing transplanted hairs to stand up like normal hairs.
11 citations
,
January 2016 in “Indian Journal of Plastic Surgery/Indian journal of plastic surgery” Direct brow lifting is effective, safe, and provides excellent long-lasting results for bald men or those with a high hairline.
April 2023 in “Asia-pacific Journal of Convergent Research Interchange” Hair manicure improves the strength and condition of bleached hair.
4 citations
,
November 2016 in “The Journal of Dermatology” Pili torti hair is fragile due to loose keratin filaments and weak disulfide bonds.
December 2025 in “Journal of Surgery Research and Practice” Accurate positioning in female hairline transplants creates a natural, feminine look.
February 2019 in “bioRxiv (Cold Spring Harbor Laboratory)” The gene Prss53 affects hair shape and bone development in rabbits.
Applying conditioner in the middle of a perm process reduces hair damage.
108 citations
,
October 2003 in “Journal of biological chemistry/The Journal of biological chemistry” Trichohyalin makes hair follicles stronger.
October 2021 in “Authorea (Authorea)” New hair perming method using tyrosine is gentler and can be done with a blow-dryer.
August 2007 in “Microscopy and Microanalysis” Hair fibers break by cuticle cell slipping, shape changing, cuticle fraying, and surface cracking when stretched under specific conditions.
4 citations
,
November 2018 in “JAAD case reports” Alopecia areata can sometimes appear as a straight line of hair loss instead of round patches.
January 2013 in “Wool textile journal” 9 citations
,
August 2021 in “Journal of clinical medicine” Pili torti is a rare condition where hair is twisted and breaks easily, often linked to genetic disorders or other health issues.
36 citations
,
October 2014 in “Langmuir” Bleaching hair removes its protective top layer and exposes more hydrophilic groups, changing its chemical surface and affecting how it interacts with products.
Hair restoration helps transgender patients achieve desired gender appearances.
1 citations
,
March 2007 in “Hair transplant forum international” Use hair-styling methods to hide thinning hair after surgery in women.
2 citations
,
July 2013 in “Acervo Digital da Universidade Estadual Paulista (Universidade Estadual Paulista)” The shampoo effectively defines and models curls while reducing frizz and volume.
Giant axonal neuropathy changes the structure of keratin in human hair, making it stiffer and stronger.
4 citations
,
January 2022 in “Cosmetics” Avoid high-tension styles and use professional treatments to reduce hair damage and health risks.
January 2006 in “Journal of Clinical Dermatology”