April 2023 in “Han'gug miyong haghoeji/Journal of the Korean society of cosmetology” Direct heat perms cause more damage to hair than softening heat perms.
February 2024 in “Medicina” AFM can diagnose hair disorders by revealing detailed hair surface changes.
September 2024 in “Heliyon” Repeated hair dyeing significantly damages hair.
January 2001 in “China Surfactant Detergent & Cosmetics” Both conditioners help protect hair from perm damage, but their effectiveness varies.
53 citations
,
April 1985 in “Developmental Biology” Fibronectin and other basement membrane components increase during hair growth and decrease during rest.
8 citations
,
December 2003 in “Materials Research-ibero-american Journal of Materials” Polyquaternium 7® builds up on hair, improving its look and feel, and AFM is good for measuring these changes.
September 2024 in “Skin Research and Technology” AFM can help diagnose lichen planopilaris by identifying specific hair structure changes.
1 citations
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July 2025 in “Journal of Cosmetic Dermatology” Lip aging differs from facial aging, needing specific care for barrier, wrinkles, and pigment changes.
October 2019 in “Skin appendage disorders” The vitreous membrane in hair follicles changes shape during the hair cycle and may affect hair growth and nutrient exchange.
11 citations
,
January 2018 in “Asian Journal of Andrology” Dutasteride caused more penile tissue changes than finasteride, possibly increasing erectile dysfunction risk.
January 2000 in “Zhongguo yixue wulixue zazhi” Different human hair keratin types have unique structures that affect how they dissolve and can be used to create self-tendons.
4 citations
,
January 2007 in “Sen'i Gakkaishi” Permed hair degrades faster and shows more damage after protease treatment compared to untreated hair.
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.
42 citations
,
April 2008 in “Acta materialia” Different ethnicities and treatments affect human hair strength and structure.
3 citations
,
December 2013 in “Journal of Dermatology” Scanning electron microscopy revealed four distinct hair root shapes in alopecia areata, suggesting a less invasive diagnostic method.
1 citations
,
June 1998 in “Journal of Forestry Research” Mammalian hair scales change from smooth to wavy due to friction.
2 citations
,
September 2025 in “BMC Genomics” Maize root hairs adapt differently to mild and severe cold, with mild stress allowing some growth and severe stress stopping growth to focus on defense.
1 citations
,
November 2021 in “American Journal of Clinical Pathology” The conclusion is that certain physical signs in the body can indicate past acute and chronic stress, which may help in child abuse investigations.
236 citations
,
July 2001 in “Trends in Molecular Medicine” Future hair loss treatments should aim to extend hair growth, reactivate resting follicles, reverse shrinkage, and possibly create new follicles, with gene therapy showing promise.
1 citations
,
April 2023 in “bioRxiv (Cold Spring Harbor Laboratory)” Climate-related nutritional stress may cause hair loss in juvenile male Guadalupe fur seals.
4 citations
,
August 2023 in “Nature Communications” Mouse zigzag hair bends form due to a 3-day cycle of changes in hair progenitors and their environment.
25 citations
,
May 2019 in “Heliyon” Hair treatments cause significant structural changes, especially with excessive heat, regardless of ethnicity.
13 citations
,
March 2006 in “International Journal of Cosmetic Science” The study found that a polymer treatment changes the charge on hair surfaces, making bleached hair smoother and less porous.
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.
August 2023 in “The Kitakanto Medical Journal” Image analysis can effectively identify changes in scalps affected by chemotherapy-induced hair loss.
January 2025 in “JOURNAL of SIBERIAN MEDICAL SCIENCES” Age-related hair loss is linked to changes in blood vessels, stem cells, and aging cells, and understanding these can help keep hair healthy as we age.
9 citations
,
June 2014 in “British Journal of Dermatology” The study found that balding scalps have more thin hairs and larger oil glands, which might contribute to skin conditions related to hair loss.
19 citations
,
July 2018 in “ACS biomaterials science & engineering” Bleaching and combing damage hair's surface and mechanical properties.
3 citations
,
December 2018 in “International Journal of Biomedicine” Platelet rich plasma therapy significantly improves hair growth and increases the number of hair follicles in men with androgenetic alopecia.
24 citations
,
May 2021 in “Nature Communications” Cavity macrophages gather on organ surfaces but don't really invade or help repair the organs after injury.