Red scalp hair turning dark-brown at 50 years of age
Juhlin L, Ortonne JP.
DOI: 10.2340/00015555667173
Abstract
We report on a man whose scalp hair was reddish since childhood but changed into dark-brown after the age of 50. His pubic hair and beard remained carrot coloured. A high level of arsenic in his scalp hair seemed to be a possible cause of the change from pheomelanogenesis to eumelanogenesis.
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