Loren Cordain, a professor of health and exercise science at Colorado State University in Fort Collins, has become a standard-bearer for the Paleo lifestyle. Despite dairy and grain industries that quote studies touting the benefits of their products, which continue to be pillars of government dietary guidelines, he insisted that our pre-agricultural forebears had nothing to do with them. And today, he added, our bodies don’t need them and can, in fact, suffer because of them.

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