The Substance is a despicable movie. I can't believe I allowed myself to get talked into watching it. It is, at best, a B-type of body horror movie. It's insulting, demeaning, disgraceful, tacky. My God, it's so tacky. I wanna make myself unwatch it. Demi Moore has always been a controversial figure, and this movie fully brings back the memories of why she was controversial in the 80s and the 90s. If you have always approved of Demi Moore and you're into horror, even bad body horror, then you'd like this film. Otherwise, stay away for the sake of your self-respect.