1 citations
,
March 2025 in “Journal of Society of Cosmetic Chemists of Japan” BECD helps straighten wavy hair by reducing undulation.
February 2022 in “Cosmetic Dermatology” Permanent hair waving uses chemicals to create long-lasting curls.
4 citations
,
June 2022 in “Journal of cleaner production” New eco-friendly method strengthens and sets hair using light and causes less damage.
13 citations
,
October 2008 in “PubMed” Japanese women's curved hair has an uneven internal structure and varying amino acid composition.
July 2018 in “Elsevier eBooks” Stopping tight hairstyles can prevent and reduce traction alopecia.
9 citations
,
March 2005 in “International Journal of Cosmetic Science” The torsional method effectively evaluates hair damage and the performance of hair care ingredients.
September 2025 in “The American Journal of Medical Sciences and Pharmaceutical Research” Thinning and micro-graduation techniques can effectively and reversibly correct women's hairlines.
Chemical treatments weaken hair's thermal stability and structure.
1 citations
,
January 2010 in “Han-guk hyeonmigyeong hakoeji/Applied microscopy” Straight permed hair loses weight faster than virgin hair when heated, but ends up heavier after burning.
27 citations
,
September 1988 in “PubMed” Hair follicle shape determines hair type: curly, straight, or in-between.
1 citations
,
October 1978 in “The Journal of Pediatrics”
19 citations
,
July 2018 in “ACS biomaterials science & engineering” Bleaching and combing damage hair's surface and mechanical properties.
62 citations
,
December 2008 in “Journal of structural biology” Hair curvature in Japanese people is linked to specific cell types and filament arrangements in the hair cortex.
4 citations
,
August 2014 in “Journal of molecular structure” Chemical treatments on bleached black hair change its internal structure by breaking and reforming bonds, and treatments with hydrolyzed eggwhite protein help repair it.
September 2009 in “Hair transplant forum international” Changing the direction of cuts can make it easier to put in implants.
January 2006 in “Journal of Clinical Dermatology” 1 citations
,
October 2009 in “International Journal of Cosmetic Science” A new keratin treatment can strengthen and protect aging hair.
1 citations
,
March 2023 in “Journal of Natural Fibers” A gentler, less damaging method for curling hair using tyrosine works well initially but fades after washing.
December 2023 in “Data in Brief” Curly hair's strength and flexibility vary with moisture and temperature.
September 2016 in “Journal of Dermatological Science” Björnstad syndrome causes twisted hair from birth.
3 citations
,
January 2018 in “International Journal of Cosmetic Science” Hair stiffness increased by 13.2% after caffeine treatment, validating the Stiffness-Angle Law as an effective measurement method.
January 2009 in “Nihon Keshouhin Gijutsushakaishi/Journal of S C C./Nihon Keshouhin Gijutsushakai kaishi” Curved human hair has different structures on each side, which might cause its shape and is similar to wool.
March 2023 in “Asian journal of beauty & cosmetology” Keratin pretreatment improves the quality of damaged hair during perming.
49 citations
,
June 2004 in “Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences” Human hair becomes weaker and stretches more easily at higher temperatures.
8 citations
,
August 1993 in “Colloid & Polymer Science” The observed "toughening" in keratin was actually due to water evaporation, not a real change in keratin.
January 2013 in “Sen'i Gakkaishi” Microfibrils are key for permanent waves, and hydrolyzed keratin improves wave formation and hair condition.
February 2026 in “Optics” Stretching wool changes its structure and improves fiber alignment.
March 1983 in “The Journal of the American Dental Association”
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.