These may be good question to ask him:
How many stage 4 cancer patients do you know that use your protocol have lived over 5 years? Or stage 3, 2, 1 cancer?
Is ketogenic diet good for someone who is skinny or in sarcopenia or cachexia condition?
What do they do to make a rat gets cancer?
Is it better to alternate ketogenic diet with carbohydrates diet, let's say, 2 weeks keto and then alternate with 1 week carbohydrates (good quality carbohydrates I mean like for example whole grain food)?