10 citations
,
December 2021 in “Frontiers in cell and developmental biology” The research identified genes that explain why some sheep have curly wool and others have straight wool.
7 citations
,
July 2011 in “Archives of Dermatology” Alopecia areata caused a boy's hair to regrow straight instead of curly, but the exact reason is unknown.
29 citations
,
July 2015 in “Journal of Medical Genetics” A genetic variant in the KRT25 gene causes tightly curled hair.
Curly wool has more orthocortex than straight wool.
May 2024 in “Frontiers in medicine” A genetic mutation in the LIPH gene causes tightly curled hair that stops growing in some Japanese individuals.
2 citations
,
June 2023 in “Journal of cell science” Mutations in iRhom2 affect hair and skin in mice and are linked to esophageal cancer, with ADAM17 playing a crucial role.
7 citations
,
January 2013 in “Indian Journal of Plastic Surgery” Body and beard hair can be used for hair transplants in baldness treatment but keep their original color and curl.
2 citations
,
August 2022 in “The journal of investigative dermatology/Journal of investigative dermatology” A specific mutation in the K25 gene causes a rare genetic disorder with curly hair at birth and later hair loss, along with dental issues.
18 citations
,
January 2008 in “Sen'i Gakkaishi” Thioglycolic acid and L-cysteine change hair structure differently during perms, affecting hair strength and curling efficiency.
August 2021 in “Han'gug miyong haghoeji/Journal of the Korean society of cosmetology” Using natural polyphenol cross-linkers like tannic acid and green tea extract in perm treatments improves curling and protects hair.
2 citations
,
January 2018 in “European journal of pediatric surgery reports” A baby girl's hair turned straight on one side due to a neck tumor and surgery, but it returned to curly as she recovered.
15 citations
,
September 2016 in “Hair transplant forum international” The "open punch" technique for hair transplantation can help reduce damage to hair grafts and may be especially useful for beginners and in cases with curly hair.
7 citations
,
January 2009 in “BMJ Case Reports” Gefitinib can cause slower, finer, brittle, and curly scalp hair.
9 citations
,
September 2016 in “Plastic and reconstructive surgery. Global open” The curved nonrotary punch is better for hair extraction in people with tightly curled hair.
February 2025 in “International Journal of Cosmetic Science” A new amino acid derivative, ATS, improves hair texture and moisture, making it easier to straighten curly hair.
May 2025 in “Dermatology Reports” A genetic mutation in the LIPH gene causes a rare hair disorder with sparse, curly hair.
3 citations
,
January 2002 in “Springer eBooks” Alkaline hair relaxers damage hair, but cationic and non-ionic polymers can help reduce this damage.
6 citations
,
February 2023 in “Genes” CUX1 boosts sheep hair cell growth and affects curl patterns.
2 citations
,
September 2010 in “Journal of the Korea Academia-Industrial cooperation Society” Using 2% collagen in perms reduces hair damage while keeping curls.
July 2024 in “Journal Archives of Health” Woolly hair is a rare genetic condition with no effective treatments.
40 citations
,
June 2013 in “Journal of cosmetic dermatology” Brazilian keratin treatments can straighten hair but may contain harmful formaldehyde.
September 2019 in “University of the Arts London Research Online (University of the Arts London)” Plant oils and polymers can help protect African hair from damage during styling.
Perms can damage hair and scalp, so proper assessment and care are essential.
7 citations
,
August 2018 in “Journal of cosmetic dermatology” Chemical hair straightening improves smoothness and shine but may cause side effects, suggesting a need for safer methods.
6 citations
,
May 2013 in “Dermatologic Surgery” FUE can be successfully done on African-American hair by using larger punch tools and careful techniques to reduce hair damage.
February 2022 in “Fibers” Scientists created a non-toxic, sugar-based hair product that can style hair without damage.
252 citations
,
November 1995 in “The EMBO Journal” Blocking EGFR in mice causes hair loss and skin changes.
40 citations
,
February 1990 in “Journal of The American Academy of Dermatology” A 17-year-old developed woolly hair nevus in adolescence, which is unusual, and over time the hair darkened and straightened slightly, but microscopic changes persisted.
15 citations
,
October 2016 in “Journal of dermatological treatment” Proper hair care can prevent and stop hair breakage in people with acquired trichorrhexis nodosa.
6 citations
,
February 2016 in “American Journal of Dermatopathology” The boy with woolly hair nevus had thinner hair and abnormal hair follicles, which improved with treatment but worsened when treatment stopped.