I have no firsthand experience with cancer but well familiar with Schulze, his videos, books, methods and protocols AND aware that he was a student of JR Christopher's. JR had developed successful cancer treatments and recommendations which certainly included dietary restrictions and yes, people with cancer who came under his care became quite thin BUT his method worried about getting rid of the cancer first! Once that priority was taken care of, the weight gain issue became the top priority of his methods and yes, he knew how to resolve that too. Good luck!