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Sorry for your loss. Can you elaborate on whether his diet excluded rice, refined grains and any other sort of simple carbs? I was rather shocked to see in the documentary 'Fed Up' that all these carb rich foods get broken down to simple sugar molecules pretty darn quick and as far as the body is concerned are identical to sugar.
Dad had adopted a (basically) ketogenic diet. He wasn't obsessively strict about it, he'd cheat, but he did a pretty good job of avoiding cheap complex carbs like bread/pasta. In all honesty, I'm pretty touchy about alternative cancer treatments. Probably too touchy. :) I watched Dad choke down blended flaxseed and cottage cheese. I had to talk him out of handing over what little money he and Mom had to some charlata…
Can completely understand, a lot of prats out there who take advantage of desperate folk struggling with an awful, awful disease.