what makes hair gray???

Basically human hair is made of two parts; root and shaft. Root is a part that is below your scalp and you cannot see that. Shaft is a part that is above your scalp and you can see it growing. The root of every hair strand is surrounded by a bulb like structure called the hair ‘follicle’. Each follicle is made up of hundreds of pigment cells.

              

Pigment cells continuously produce a pigment called melanin (melanin is protein that is dark brown to black in colour). This pigment gives hair shaft their colour. As we grow older the pigment cells in the hair follicle die gradually. Due to the lack this pigment hair also loses its colour from black to lighter shades. Hair with less number of pigment cells acquire grey, silver or white colour.