When I first introduced this section ten years ago, I had some hesitations about including them in a book on the world’s healthiest foods. That I would have any hesitation at all may seem surprising to you, but at the time I was very influenced by the writing of professor Loren Cordain, Ph.D., an authority on ancestral diets and one of the original founders of the Paleo movement.

Cordain—and most of the Paleo gurus who came after him—shun beans because of their lectin content (more on that in a moment). But in the years since, I’ve come to believe that the lectins in beans are only a problem for about 10 percent ...

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