January 2017 in “Clinical approaches and procedures in cosmetic dermatology” Cosmetic procedures can harm hair, but damage can be minimized with knowledge and care; however, once hair is damaged, it cannot be reliably repaired.
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.
Thermal straightening can damage ethnic hair and may pose health risks.
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January 2017 in “Clinical approaches and procedures in cosmetic dermatology” Hair can't be reliably repaired once damaged; prevention and proper product use are key to maintaining hair health.
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October 2016 in “Journal of dermatological treatment” Proper hair care can prevent and stop hair breakage in people with acquired trichorrhexis nodosa.