A gleefully grotesque satire of success, director Coralie Fargeat’s English-language debut, The Substance, lives up to its title. But it has plenty of style to spare as well. Demi Moore stars as Elizabeth Sparkle, a fading actress who, in a moment of great weakness, decides to sample an underground drug that purportedly reverses the ageing process. But she quickly discovers that she has bitten off more than she can chew. The Substance is to Moore’s career what Birdman was to Michael Keaton’s, or The Wrestler was to Mickey Rourke’s, a movie that sheds its superficial obsession with superficiality and transforms into a whole new beast towards the end. It’s the kind of film that requires courage from everybody involved, including the caterers who were presumably tasked with preparing a menu that wouldn’t end up on the shooting floor everyday. It would be remarkable if nobody threw up while making this movie, because every moment of its incredible final act positively challenges you to keep your lunch in your stomach. But before Fargeat unleashes her final flourish, she sets up an increasingly absurd universe for Elizabeth to navigate.