Coreopsis tinctoria Nutt. extract can effectively dye hair yellow or dark brown with good wash durability.
July 2024 in “Dermatology and Therapy” Darker hair colors may increase the risk of alopecia areata, while lighter hair colors may decrease it.
January 2007 in “Journal of the American Academy of Dermatology” A 73-year-old man's grey-white hair turned dark brown after eczema treatment.
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September 2024 in “Journal of Oncology Pharmacy Practice” Hydroxyurea treatment unexpectedly restored hair color from gray to dark brown in an older woman.
March 2023 in “Journal of Cosmetic Dermatology” Trichoscopy is effective for diagnosing scalp ACC in darker skin tones.