99% myth: Different people gray at different speeds, it seems to be genetic. Emotional or physical stress causes some people to develop telogen effluvium and the hair may regrow gray.
Answered 9/11/2012
5.6k views
May contribute: Graying of hair is related to genetic predisposition. Age of initial graying is largely a matter of genetics. However stressors: nutritional deficiencies, chemotherapy, traumatic head injuries, low vitamin B levels, zinc deficiency, severe illness, surgery & marked emotional stress may impact earlier depigmentation in people who are already predisposed to gray hair. Aging is a significant factor.
Answered 9/18/2017
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