47 citations
,
January 2017 in “RSC Advances” Keratin peptides can change hair shape gently without harsh chemicals.
4 citations
,
April 2019 in “Cosmetics” Hair stiffness is higher when it has more para-like cortical cells.
Frizzy hair is fragile and can lead to hair loss and damage if not properly cared for.
January 2012 in “Jounal of The Korean Society of cosmetology” Applying conditioner mid-treatment reduces hair damage during perms.
November 2024 in “Journal of Microscopy” Human hair varies in structure based on curl type, with high curl hair showing the most differences.
Human hair can almost fully recover its structure within about 1,000 minutes after being stretched.
1 citations
,
May 2009 in “Hair transplant forum international” The document's conclusion cannot be provided as the document is not accessible or cannot be parsed.
August 2023 in “British Journal of Surgery” Synthetic hair transplants can lead to skin cancer on the scalp.
3 citations
,
July 2021 in “Cutis” New military hair rules for women promote inclusivity and prevent hair damage.
70 citations
,
June 1998 in “Polymer” Permanent waving damages hair by disrupting its keratin structure.
3 citations
,
June 2019 in “Journal of cosmetic dermatology” Lower pH straighteners change hair more but weaken it.
March 2025 in “Journal of Craniofacial Surgery” Natural hairline asymmetry should be embraced for better-looking hair transplants.
February 2019 in “bioRxiv (Cold Spring Harbor Laboratory)” The gene Prss53 affects hair shape and bone development in rabbits.
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.
23 citations
,
January 2016 in “Forensic Science International” Thermal hair straightening changes drug levels in hair, affecting test results.
January 2013 in “Sen'i Gakkaishi” Microfibrils are key for permanent waves, and hydrolyzed keratin improves wave formation and hair condition.
March 2023 in “International Journal of Dermatology” COVID-19 can cause hair to become progressively kinked.
Applying conditioner in the middle of a perm process reduces hair damage.
5 citations
,
September 2023 in “Pediatric Research”
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.
3 citations
,
January 2009 in “Sen'i Gakkaishi” Using both TGA and DTDG in hair straightening reduces hair damage compared to using TGA alone.
1 citations
,
June 2021 in “Preprints.org” Hair relaxers and straighteners can be toxic to skin cells.
13 citations
,
January 2001 in “Pediatric dermatology” A dark-haired Chinese girl had hair that looked banded under certain light but was normal under a microscope.
13 citations
,
June 2021 in “Carcinogenesis” Certain hair straighteners and dyes may increase ovarian cancer risk, especially in African American/Black women.
January 2024 in “Indian Journal of Pharmaceutical Sciences” Relaxing certain muscles might straighten curly hair.
7 citations
,
January 2012 in “International Journal of Trichology” A man with Woolly Hair Syndrome had very curly, fragile hair, and doctors used a special scalp examination to diagnose him without invasive tests.
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.
Different treatments change the strength and flexibility of human hair.
9 citations
,
July 2014 in “Skin research and technology” Stretching damages Caucasian hair's structure more easily than Asian hair.
December 2023 in “Data in Brief” Curly hair's strength and flexibility vary with moisture and temperature.