7 citations
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March 1990 in “Pigment Cell Research” This animal study observed that while topical MBEH and intraperitoneal phenol induced hair graying in eumelanic mice, they had little effect on pheomelanic mice, and amcinonide reduced certain epidermal melanocytes in both.
63 citations
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February 2017 in “ACS biomaterials science & engineering” In this study, polydopamine emerged as a safe and effective alternative to traditional hair dyes like PPD for dyeing gray hair permanently, showing resistance to detergents and causing less toxicity and hair loss in mice.
38 citations
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June 2005 in “Acta Biochimica Polonica” This study found that spleens of black C57BL/6 mice contain eumelanin, with properties different from skin and hair melanin, and may originate from skin melanin transported by immune cells.
30 citations
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June 2006 in “British journal of dermatology/British journal of dermatology, Supplement” In this study, oral zinc sulphate was found to cause hair hypopigmentation and significantly inhibit eumelanogenesis in mice.
14 citations
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September 2017 in “General and comparative endocrinology” In this study, researchers observed that in barn owls, the relationship between black feather spot size and testosterone levels varied by age and sex, suggesting involvement of genes regulating both traits rather than direct influence of testosterone on feather coloration.