Now, I'm all for the "there are more things in heaven and earth, Horatio, than are dreamt of in your philosophy" thing. Live and let live and all that. Who am I to say that somebody's entire worldview is wrong just because it conflicts with mine? Nobody at all. But when he tells me (straight faced) that he can cure (CURE, mind you) 90% of cancer patients who come to him, even those with advanced disease, simply by administering the proper combination of minerals, I call bullshit. I'm a cancer biologist by training, remember. He also told me that asthma can be cured by the administration of two specific minerals (wish to hell I could remember which ones) and that diabetes is simply a deficiency of calcium. Apparently nutrition is his specific thing. His own family adheres to the blood type diet, which I'd never heard of before. As in, what your blood type is dictates what you should eat.
I didn't have the energy to argue with him, although I did ask a lot of questions. I can't imagine a scientific basis for what he was saying, but it was still very interesting, and again, who knows? It's the rare person I've met in my life from whom I can't learn anything at all. Unfortunately, I had to walk away when he told me that he doesn't vaccinate his children: it was either that or have my head explode.