More celebrities are embracing grey hair. For other women, it can come at a cost

To dye, or not to dye. That is the decision many people, particularly women, face when their hair starts to grey.

This week Olivia Colman joined the growing ranks of women embracing grey hair and ditching the dye. Appearing at Zurich film festival, Colman had swapped her dark signature pixie cut for a grey, curly mane swept to one side.

Online, Colman was swiftly lauded for her new look, with Vogue describing her as a "silver hair muse"...