“The Substance” (2024) – “It changed my life.” Elisabeth Sparkle (Demi Moore) is a successful, Oscar-winning actress and proudly has a star on the Hollywood Walk of Fame. These days, she shines on the small screen as a fitness instructor for a television show that looks like a throwback to the 1980s and 1990s, the “:20 Minute Workout” meets “Getting Fit with Denise Austin”. However, her exercise gig suffers a career-ending injury when her misogynistic boss, Harvey (Dennis Quaid), fires her due to her age and on her 50th birthday…