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Comparison of hair shaft damages after treating chemical stresses in Asian, Caucasian, and African hairs

Other Titles
 화학적 스트레스에 대한 인종간 모발손상 차이 
Issue Date
Dept. of Medicine/석사
Purpose: The goal of this study was to investigate the differences in serial pattern damage in Asian, Caucasian and African hair after chemical stresses such as straightening and coloring.Materials and Methods: The chemical stress-induced hair damage was studied in hair from three ethnic group. The hair was divided into control and treatment groups (straightening, coloring and combination of straightening and coloring). Commercial products were used for straightening and coloring treatment. After 24 hours from the final treatment, the hair damage patterns were evaluated using transmission electron microscopy (TEM), lipid TEM and a halogen moisture analyzer. The grades of hair cuticle and cortex damage were evaluated by three dermatologists.Results: In the TEM examination, the Asian hair showed a more resistant cuticle after straightening treatment, and the Caucasian hair cuticle and cortex were relatively susceptible to the coloring treatment. After the combination treatment of straightening and coloring, the African hair was the most resistant to stress. In the lipid TEM examination, no notable differences in cell membrane complex damage among the three groups of hairs were observed. Among the three ethnic groups, Caucasian hair showed the lowest water contents after straightening, coloring and combination treatments.Conclusions: Present study suggests that Caucasian hair is relatively susceptible to and African hair is more resistant to chemical stress, such as straightening and coloring.
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1. College of Medicine (의과대학) > Others (기타) > 2. Thesis
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