What lifestyle diseases are you thinking of that are commonly treated with immunosuppressants? Diseases like psoriasis and rheumatoid arthritis are commonly treated with immunosuppressants and are not considered lifestyle diseases.
these both OFTEN have dietary triggers that are possible to discover with certain elimination diets
again, I'm not here to go on long arguments while being called a loon, which I'm bound to when touching this subject
sticking closer to home, tldr; I had MS, treated it with an elimination diet and other lifestyle changes, barring this intervention, I'd be on immunosuppressants
but I didn't intend to make this the larger part of my argument, as the main issue is with people facing blood sugar control problems brought on by "extremely western" (sugar|processed|junk)-food-laden diets
Had to login just to counter the epilepsy part of this comment, though I think it applies to the rest of the topic wrt cancer as well. Keto diets can, in some cases, help epilepsy patients, particularly those with certain seizure types or genetic basis. But, like with cancer, epilepsy is complicated both in presentation and cause and to pretend that keto is any way a cure for epilepsy outside of a small minority of patients isn't true. See https://www.epilepsy.com/learn/treating-seizures-and-epileps... for high level overview.
Lol "sometimes is enough, sometimes not" is a bit of a backpedal from definitively putting cancer into remission.
If it's an area of legitimate research for cancer treatment, then why do you lead with a reference to an individual crackpot - instead of even a poorly designed peer-reviewed study in a low impact forum.
Of the millions of possibilities, why do you assume that it was the keto diet of this individual that lead to their remission? Do you lack the imagination that it would likely be something else?