Scientifically speaking, the concept of ‘grey hair’ is somewhat a misnomer. There really is no such thing when you take melanin — the natural, colour pigment of the body — into consideration. For most of us in Pakistan, this pigment is black or brown in colour and it doesn’t ‘fade out’ into lighter shades.
Instead, the progressive demise of melanin increases melanocyte (cells which infuse the hair follicle with colour) production, causing the normal-pigmented hair to become interspersed with white. With a loss of melanin, new hair produced is without any pigment.