Dark hair with a red beard likely evolved for camouflage, not attraction.
October 2023 in “Biomimetics” The new hair-dyeing shampoo is safe, colors hair evenly, and strengthens it.
June 2025 in “Clinical and Experimental Dermatology” Baricitinib treatment led to dark brown hair regrowth in a red-haired woman with alopecia areata.
January 2015 in “Journal of cosmetics, dermatological sciences and applications” The combined technology safely and effectively removes hair at home on dark skin.
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January 2001 in “Pediatric dermatology” A dark-haired Chinese girl had hair that looked banded under certain light but was normal under a microscope.