Why would i start growing gray hair as an adolescent?

See below:: Early graying in kids tends to be inherited. Other conditions can cause gray hair: alopecia areata, which causes patches of hair loss on the scalp & other parts of the body. As the hair grows back, it may be gray at first; vitamin B12 deficiency: abnormal thyroid hormone levels in the body; vitiligo (causes a decrease of pigment in the skin), tuberous sclerosis, neurofibromatosis & waardenburg synd.

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 –.