Raw Vegan Juicing, vs. Fasting. Handoff Unclear

On one hand, a Water Fast of 8, 14, or 21 days should get rid of a small cancerous tumor through autolysis.

On the other hand, a raw vegan + juicing diet, implementation of the Gerson therapy, etc. supposedly helps with cancer.

So what is the best relationship between the two?

Two Water Fasts did not do this for me as of yet. However, in this video, Dan MacDonald at 13:30 says that when there was insufficient nutrition between fast, the body rejected the fast to some extent.

https://www.youtube.com/watch?v=I8FxjTaqbmU

Does that mean that a big blast of vegetable juice after fasting, continued for 3 months, and then a new fast, is the proper staging? Does that rebuilding enable you to dig deeper?

It is very unclear.

I am also a bit worried that I have not regained the weight I lost from fasting. The first fast alone made be lose 25 pounds. The second fast didn't keep me lower than that, but I am still 30 pounds lower than I was before the first fast. This is not good. I would like to go back to my original weight.