What is the cause of gray hair in young people?

Early onset in some: Hair greyness is a bell shaped curve distribution and some are on the early side of this curve and get grey hair at a young age. It is not due to diet or lifestyle.

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. In general.