April 2026 in “Journal of Cosmetic Dermatology” This study reports that specific hair care practices common among individuals with high-curl-pattern hair could exacerbate seborrheic dermatitis, presenting significant treatment challenges and psychological impacts, and emphasizes the need for further research to tailor culturally sensitive solutions.
September 2025 in “Cosmetics” In this study, researchers found that the lipid composition in hair significantly affects water diffusion and may explain differences in dyeing and cosmetic treatment responses between Asian and European hair, with CP2 fibers having more lipids than CP3 fibers.
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April 2022 in “International Journal of Women's Dermatology” This study suggests that curl pattern classification could help improve patient communication and risk stratification in hair loss disorders, but its clinical utility in dermatology needs further validation.
November 2024 in “Journal of Microscopy” This study found that micro-computed tomography (micro-CT) was highly effective for analyzing the cross-sectional geometry of hair fibres, including the medulla in highly curled hair, but less effective than scanning electron microscopy for surface details.
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October 2007 in “International Journal of Dermatology” In this study, researchers found that the curliness of human hair is associated with an asymmetric structure at the cellular level, particularly in the differentiation of the precortex.