13 citations
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December 1940 in “The journal of nutrition/The Journal of nutrition” In this study, silver foxes given a yeast "filtrate factor" supplement retained their fur and normal pelts, while those without it experienced fur loss and thymus abnormalities.
11 citations
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July 2008 in “International Journal of Dermatology” This article discusses a case of patchy alopecia areata that spares greying hairs but reports no new findings; it refers to existing literature for context.
This study found that ponytails with small fractions of gray hair have significantly lower swing height and higher damping, affecting the dynamic movement and appearance compared to those with fewer gray hairs.
62 citations
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December 1941 in “Experimental biology and medicine” In this study, phenylthiocarbamide intake was associated with hair graying in rats, while switching to tap water led some rats to regain their original fur color, suggesting dietary factors influence pigmentation.
17 citations
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January 2015 in “Pharmacognosy Research” In this study, the herbal hair colorant formulation HD-3, with a mix of specific herbs, was most effective at coloring hair and highly accepted by volunteers.