edit: not really low brix but mineral deficient
This may not explain why one gets gray hair or why one day one gray hair will appear right next to a dark one, but it does appear that the lack of minerals in a hair does express a lack color!
It also suggests that mineral deficiencies are related to aging and graying!
Abstract;An investigation of the metal concentrations of potassium, sodium, calcium, magnesium, copper, zinc, manganese and iron in the black and gray hairs of the same person in Taiwan was performed using atomic absorption spectroscopy (AAS). The flame modus of ...
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