Sillyness. I don't need credentials. I only need quote scientific journals to inform you of the science done by researchers published in those journals. I personally have nothing to do with it. I'm only an information conduit. So since you're doing the ad hominem thing, please post links to the last 3 papers your guy has published on these subjects in peer-reviewed nutritional journals.

The Grain Belly guy is a decent example of this bro science. His book contains copious links to scientific studies. But if one were to look at those studies, one discovers that they prove the opposite of his book's thesis. The author counts on the laziness and ignorance of those who bought his book, a fair bet as it turns out.

One can educate one's self in many fields, simply by reading original research published in those fields. Of course one needs the education and vocabulary to make sense of what one reads, but one can get those things too, in the same way. There's a woman who was raised in an Idaho cabin, who was forbidden to go to school. Her mom taught her to read the Bible. And off she went. She's now a professor at Oxford. She educated herself.