I've been reading a lot of his stuff. He sure did a huge amount of research. The story of his teacher Cursio? I think is his name and his experiences when he served as an adviser to some of the natural healers of his time is very enlightening - you should check it out. I think it may be on one of the downloadable pdf's he's got on the site. I down loaded all odf them and have been going through them slowly.
I believe he is still living in his nineties now - but I'm not sure - the radio interview is also interesting.
definitely is encouraging to us to learn from teachers what is useful and then also do our own reading and research to come to our own conclusions.
I think the basic conclusion was one of moderation - eating some fruits - mostly vegetables and a very small amount of protein.