49 citations
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June 2009 in “Seminars in Cutaneous Medicine and Surgery” This article examines differences in aging among ethnic populations and highlights cosmetic procedures specific to skin of color, but reports no new research findings.
1 citations
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January 2014 in “Annals of Dermatology” This study surveyed hairline preferences and found that the M-shaped contour was most preferred overall, with lower forehead heights favored by men and those without a history of hair transplantation.
May 2011 in “Archives of Plastic Surgery” This study found that the inverted U-shape hairline is the most common among Korean male adults in their 20s and 30s, with an increased prevalence of the M-shape in their 30s.
May 2026 in “Zenodo (CERN European Organization for Nuclear Research)” This review highlights that natural hair dyes from plant-derived pigments can produce viable colors on gray hair with low irritation potential, though they face challenges in shade range and consistency; some products may also be adulterated, affecting safety perceptions.
May 2026 in “Zenodo (CERN European Organization for Nuclear Research)” This review summarizes current research on natural hair dyes, reporting that plant-based formulations can safely provide viable colors on gray hair with minimal irritation compared to synthetic options but face challenges in color range and consistency.
