78 citations
,
June 2003 in “Journal of the American Academy of Dermatology” Curly hair shape is determined by the hair bulb.
13 citations
,
November 2012 in “International Journal of Dermatology” Curly hair breaks more easily, especially with chemical treatments, but simpler grooming reduces breakage.
12 citations
,
July 2015 in “British journal of dermatology/British journal of dermatology, Supplement” Curly hair breaks due to mechanical damage and environmental factors, not chemical makeup, and needs ongoing care to prevent breakage.
8 citations
,
January 2020 in “The journal of investigative dermatology/Journal of investigative dermatology” Curly hair is mechanically different from straight hair and may need new testing methods.
5 citations
,
February 2016 in “Clinical psychopharmacology and neuroscience/Clinical Psychopharmacology and Neuroscience” Valproate can cause rare hair curling in some patients.