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Besides natural pigment, stress and malnutrition can change your hair color. Grey hairs are the first sign of stress, while dull, lackluster hair can point to a vitamin deficiency.
But all this speculation is now a historical curiosity. The results are widely known from conference presentations that have been reported, but finally the paper is out in Science which solves the ...
In some cases, hair that has lost its color may darken again; however, if irreversible damage has occurred to the melanocytes, parts of the hair will remain permanently white.
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