Grey hairs sometimes regain their colour when we feel less stressed

By Alice Klein

Tara Moore/Getty Images

People’s grey hairs sometimes naturally regain their original colour, typically when individuals feel less stressed. The finding suggests it may be possible to develop drugs to reverse greying.

Lab mice go grey when stressed and the same thing seems to occur in people. It has long been assumed that once hairs turn grey, they stay that way. But Martin Picard at Columbia University in New York and his colleagues discovered by chance that hair greying sometimes naturally reverses.