In a mouse model. Mice aren't naturally big meat eaters so could be some differences.

One thing that has shown promise in anecdotal reports is in addition to the ketogenic diet (to produce ketones) is the addition of exogenous ketones via ketone supplements. This lets the exogenous ketones supply some of the needed energy in addition to whatever the body is able to produce naturally.

I think for cancer a prescription strength ketogenic diet which consists of moderate or adequate protein (for muscle) and high fat(for energy and essential fats), since fat is what the ketones are made from (fat burning vs glucose burning). When a person depends on fat for their energy source it either has to come from the stored body fat or from dietary fat. So it might depend also on how chubby a person was at the time what a good diet for cancer would be (my speculation).

Ketone supplements       #mce_temp_url#

MCT oil        #mce_temp_url#

Edit: MCT oil (medium chain triglycerides) are also a source of fat that can readily be turned into ketones. Obviously not carnivore because they are derived from coconut or palm kernel oil. They bypass normal digestion (like would be for long chain fats) and are ported to the liver with their main conversion to ketones.