"Targeting insulin inhibition as a metabolic therapy in advanced cancer: A pilot safety and feasibility dietary trial in 10 patients", Eugene J. Fine et al., Nutrition, 1028-1035,2012
The Heretic has this comment:
It is interesting to note that, contrary to a myth about keto diets being supposedly harmful for kidneys, not only it did not worsen the markers, but improved kidney filtration of one of the patients!Caveat: It was only 9 patients, and it helped only 5 of them.
It is important to keep in mind that stopping of a disease progression is not the same as curing it. Ketogenic diet seems to help but I do not consider it to be a universal cure for cancer (it does however cure t2 diabetes!).