Heat-Damaged Evaluation of Virgin Hair

    March 2019 in “ Journal of cosmetic dermatology ”
    Cibele Rosana Ribeiro de Castro Lima, Ricardo Alexandre Alves de Couto, Thamires Batello Freire, Alessandra Mari Goshiyama, André Rolim Baby, Maria Valéria Robles Velasco, Vera Regina Leopoldo Constantino, Jivaldo do Rosário Matos
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    Studysummary This study found that thermal hair-straightening devices significantly damaged the cuticle and cortex of virgin Asian and Caucasian hair, with Asian hair experiencing more protein loss than Caucasian hair. Our plain-language summary of this paper — not a Tressless recommendation.
    This study evaluated the effects of heat on the cuticle and cortex of Caucasian and Asian virgin hair using various analytical techniques. Results showed that heating caused significant damage, including denaturation of α-keratin and degradation of hair cortex components. Protein loss was greater in Asian hair compared to Caucasian hair. The study highlighted the importance of temperature control in hair-straightening procedures, as the extent of damage varied with hair ethnicity.
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