Daily hair care may cause holes in hair fibers.
Moisture makes hair flexible for reshaping during blowouts.
January 2018 in “대한미용학회지” White hair is denser and more hydrophobic than black hair.
81 citations
,
December 2007 in “Acta materialia” AFM helped show how hair changes under tension and the effects of damage and conditioner.
9 citations
,
July 2014 in “Skin research and technology” Stretching damages Caucasian hair's structure more easily than Asian hair.
49 citations
,
July 2019 in “British Journal of Dermatology” Wnt signaling is important for the change from the resting phase to the growth phase in human hair cycles.
February 2010 in “Journal of the American Academy of Dermatology” The shampoo and conditioner improved dry, damaged hair significantly after three uses.
1 citations
,
January 2020 in “Journal of the Society of Cosmetic Scientists of Korea”
Perms can damage hair and scalp, so proper assessment and care are essential.
101 citations
,
July 1985 in “Journal of the American Academy of Dermatology” Biotin improved hair growth and combability in one child with uncombable hair syndrome.
January 2003 in “Research Portal (King's College London)” Hair color affects light reflection, with black hair having higher cuticle angles and lighter hair showing less specular reflection.
19 citations
,
January 2009 in “International review of cell and molecular biology” Hair's strength and flexibility come from its protein structure and molecular interactions.
October 2015 in “Cosmetic Dermatology” Hair styling products and tools help improve hair's look and manageability but can damage hair if used incorrectly.
3 citations
,
July 2003 in “PubMed” The research found a way to measure hair surface changes by analyzing how light reflects off of it, and determined hair cuticle angles vary by hair length and color.
December 2025 in “Brazilian Journal of Hair Health” The Spiral Model helps understand hair growth changes with age and identify hair problems early.
December 2025 in “Biological and Clinical Sciences Research Journal” The Waris Hairline Dot Technique is highly effective, natural-looking, and has minimal recovery issues.
Human hair can almost fully recover its structure within about 1,000 minutes after being stretched.
5 citations
,
January 1990 in “Journal of Society of Cosmetic Chemists of Japan” Permanent wave lotion can extract proteins from hair, especially when pH is higher, and repeated treatments or bleaching can damage hair.
Curly hair may be caused by a muscle contraction, and muscle relaxants might help treat it.
26 citations
,
October 1999 in “Archives of Dermatology” Curly hair in certain scalp areas can be an early sign of hair loss.
97 citations
,
January 2005 in “Wear” Human hair and skin friction vary by ethnicity, hair type, and environmental conditions.
December 2025 in “ILDS-DEV” July 2026 in “Journal of Investigative Dermatology”
33 citations
,
August 1985 in “Archives of Dermatology” Acquired Progressive Kinking of Hair is likely an early sign of male pattern baldness.
54 citations
,
September 2000 in “Archives of dermatology” A hair-straightening product caused widespread hair loss and scalp injuries, mainly affecting African American women.
September 1972 in “大会学術講演梗概集. 構造系” The document explains common hair disorders and the basics of hair anatomy and life cycle.
5 citations
,
September 2023 in “Pediatric Research”
12 citations
,
February 2006 in “Lipids” Hair texture changes with age due to varying levels of lipids.
May 2025 in “Dermatology Reports” A genetic mutation in the LIPH gene causes a rare hair disorder with sparse, curly hair.