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This overproduction causes depletion of the melanocyte stem cells which are required to produce melanin, the pigment responsible for hair color. [ 2 ] Premature greying of hair has been observed with greater frequency among certain families, suggesting a familial predisposition for the condition.
The granny hair trend (also known as Granny gray) is a new phenomenon of young women coloring their hair to different shades of gray.It emerged in the 2010s. For centuries, people have tried to hide graying hair with methods like dyeing, coloring and henna since gray hair appears most often on older adults and aging is stigmatized in most Western societies. [1]
The Fischer–Saller scale, named after Eugen Fischer and Karl Saller is used in physical anthropology and medicine to determine the shades of hair color. The scale uses the following designations: A (very light blond), B to E (light blond), F to L (), M to O (dark blond), P to T (light brown to brown), U to Y (dark brown to black) and Roman numerals I to IV and V to VI (red-blond).