There is a book "The Grape Cure" by Johanna Brandt Published by "Benedict Lust Pub." you might be interested in. I have never had cancer "praise God" but I used the grape cure for absessed teeth and My mother-in-law when she had brain cancer was drawn to the grapes that were growing outside the back door, she ate them all day every day until they were gone. She did not know about the grape cure and her family was not interested in trying alternative treatments but she live almost a year longer than 2 other persons that has the same cancer, dignosed at the same time. Worth a try if you are going to try fasting anyway because that is how the author found out about grapes.
May God bless,