youtube.com/watch?v=5sYClVQ...
A video worth watching
"How Can the Ketogenic Diet Help Patients with Parkinson's Disease? ... The only other substrate that it can use is that of ketone bodies produced when following the ketogenic diet. The ketogenic diet (KD) is a high-fat, moderate protein, low-carb diet that makes your body switch from glucose to fat and ketones as fuel."