Speaking from personal experience as a 50+ adult with CAH; keep only fruits and vegetables in the house, absolutely no sweets, get a treadmill or eliptical machine and make her use it. It is terrible to say, but I wish my parents had kept me on a starvation diet. Genetically, I should be 5’10" tall and my body wants to eat like that, but I keep it starved and exercised and watch every morsel put in my mouth. You must do that for your daughter.