Over time, the pigment-producing cells in each hair follicle tend to slow or shut down, turning hair grey, said Desmond Tobin, director of the Charles Institute of Dermatology at University College Dublin. Research suggests that if the first process happens without the second, grey hair can be reversed. Some people with grey hair have also spontaneously repigmented in patches after getting certain types of chemotherapy, radiation or immunotherapy. For example, some antiseizure medications, antimalarials, oral retinoids and muscle spasticity drugs have been tied to hair greying. For most people, there’s not much you can do to prevent grey hair, but stacking small changes can help.

Source: The Irish Times April 06, 2026 06:01 UTC