Yes indeed, the Gerson therapy did use raw calf's liver, but we should bear in mind that this was the only animal food he used in his original protocol.
I think it would also be true to say that most Alt' cancer therapies do not actually use any meat as part of any cancer therapy.
Just a few examples would be B17, Essiac Tea, Oleander, flax-seed with quark, detox via juice-fasting or water-only fasting, Vitamin D3, and so on and so on.
I suppose if meat was that good in an anti-cancer protocol/therapy, it would probably be the mainstay of the treatment, which it is not.
This is not designed to instigate debate but just an observation of some of the facts.