Is hair a ‘live cell’ or is it the result of dead cells?

 Hair develops from the cells of the hair bulb, which divide rapidly.

The cells of the hair bulb move upwards as new cells begin to form beneath them.

As these cells move higher, they are cut off from their supply of nourishment and start to form a hard protein called keratin. The formation of keratin is called keratinisation, and the hair cells die as it occurs because the nourishment does not reach these cells.