Supermodel Carol Alt has been rehearsing and started filming her new Fox show, “The Healthy You,” this week. “It’s basically Dr. Oz, but think 180 degrees,” she tells us. “It’s all alternative, it’s the things you don’t see in the mainstream.” The show, which we’re told will start airing Sept. 7, is full of things Alt has tried. “I’m a woman, I’m getting older. We can’t deny that stuff,” she says. “I just want to make it easier and healthier for other women to do the same thing. We’re doing a show on enzyme cures for cancer, the debate on vaccinations, coffee . . . mistakes people make in yoga . . . I try everything, so everything has been tried on me.”