Discussion Despite several studies into the biology and genetics of hair greying or canities, the mechanism by which human scalp hairs lose pigmentation remains poorly understood, due in part to the complexity of interaction between different cell types, complex protein interactions, differential gene expression during the hair growth cycle, and variable conditions that occur within the hair follicle microenvironment 1,7,8,9,10,13,41,60,69,70,71,72,73,74
Do not discontinue prescribed B12 treatment without medical advice, as this may be managing an important deficiency state
The subcutaneous route is preferred for all other uses
Pober JS, Min W (2006) Endothelial cell dysfunction, injury and death