This article reviews differences in hair characteristics between Asians and Caucasians, highlighting Asian hair's lower density and thicker dermis, and reports no new research findings.
January 1994 in “Nihon Chikusan Gakkaiho” This study observed that mink dermal collagen fibrils undergo structural changes during the hair cycle, with increased fiber thickness and bundle density as minks grow.
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January 2002 in “Exogenous Dermatology” In this study, researchers reported that chronic UV exposure may contribute to androgenic alopecia progression by influencing hair cycle changes and exacerbating solar elastosis in the scalp.
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June 2006 in “Journal of Cosmetic Dermatology” This study found that photoepilation in mice may disrupt normal dermal wound healing and increase the risk of hypertrophic scars or keloids.
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September 2017 in “Cell Reports” Caloric restriction improves skin and fur structure but can cause muscle loss and movement issues.