I have long said if I was diagnosed with cancer I would immediately do a water only fast, but a ketogenic diet is probably better, since the muscle mass won’t suffer. This approach is based on the fact that cancer cells require sugars to survive, so on a ketogenic diet they will be stopped from growing. A young Canadian woman is doing the keto diet to deal with her brain cancer. Here is her blog: http://greymadder.net/
"A Retreat from Sweet"
Sugaraholics 