The Substance” blowtorches a single idea for two hours and 20 minutes, and narratively it turns to ashes by minute 40. It’s easier for a movie to become a talking point that way. Film festival buzz, which “The Substance” enjoyed at its Cannes world premiere,

Three things need to be said about “The Substance” at the outset: First, it is a movie that’s so extreme that it makes you wonder — in the best way — if the filmmaker is crazy. Second, this is, without doubt,

Since its Cannes premiere “The Substance” has churned controversy over its body horror scenario, frequent, flagrant nudity – and buzz about a Best Actress Oscar nomination for Demi Moore.