For many women, getting older can feel like a horror movie. That's the take of new film The Substance, in which Demi Moore plays an ageing actress tempted by the promises of a youth-making drug.

The pressure for women to stay beautiful and thin as they age is a tale as old as time but the film has thrust the conversation into the spotlight in a new way. 

Former Vogue editor-in-chief Kirstie Clements shares her experiences with cosmetic treatments, and looks at how the attitude towards beauty and ageing is shifting.