I don't for one second believe that they are advocating a dangerously unhealthy diet in their programme but isn't the title a bit much? Aren't they really saying Cook to be Underweight? Cook to Be Skin and Bones? Cook Yourself Into a State of Being Medically At Risk of a Number of Unpleasant Conditions? Because that's what thin really means isn't it?
I'm sure Cook to be Nice and Slim would have sufficed.