There is possibility of growing the hair but it is important to check the status of the scalp, hair follicle. If hair follicles are dead then regrowth is not possible but if they are alive then regrowth is possible.
Hair is made up of proteins, minerals and iron. It is very important to eat healthy food like sprouts, beans, nuts, green leafy vegetables. Drink 3 lit of water/day. Oil the scalp 3/week and wash it 3 / week.
Consult trichologist.