Paige took her daughter to Chicago to see a Dravet specialist, who put the child on a ketogenic diet frequently used to treat epilepsy that's high in fat and low in carbohydrates. The special diet forces the body to make extra ketones, natural chemicals that suppress seizures. It's mainly recommended for epileptic patients who don't respond to treatment. The diet helped control Charlotte's seizures but had a lot of side effects. She suffered from bone loss. Her immune system plummeted. And new behavioral problems started popping up. Two years into the diet, the seizures came back. - CNN