The degree of cancer progression slow down or remission correlated with the degree of ketosis and degree of ketosis correlated inversely with the level of insulin.
The study lasted 26-28 days and involved only nine patients who completed the study, all of whom begun with rapidly progressing advanced and incurable cancers.
|Fig 2 (part, 1 out of 4 graphs) from the study. β-OH butyrate|
(beta hydroxy butyrate) represent a degree of ketosis.
"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
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!
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!).