“The Substance” is a non-stop, go-until-you-gag epic that builds and builds and builds until it scars everyone in the audience with a deep-seated physiological aversion to the idea that we can ever hope to escape from ourselves. Fargaet’s movie escalates with the kind of ultra-confident audacity that leaves you laughing out loud at sights that would otherwise make you shriek instead, and it simply refuses to end until even Harvey himself is sickened by how society pressures women into shaping their bodies. And so, like any fairy tale worth its unforgettably frightening special effects, “The Substance” concludes with a clear moral that it makes you want to believe in: There’s more beauty in freedom than there is freedom in beauty. And it’s absolutely gorgeous to watch Elisabeth Sparkle and Demi Moore help each other escape into the light of that truth.  – IndieWire

“Some will run screaming, but if it’s your jam, this could just be your new favourite horror movie.”– TimeOut